Costco's reputation rests on a generous return counter, which means most problems are solved in person at the membership desk. Complaints that need a phone call are different: Costco Canada splits its lines by topic, and the right number depends on whether you bought in a warehouse, on costco.ca or need warranty help on electronics.
Pick the line before you dial
Calling the wrong department usually means a transfer and another wait. Match your problem to the number below.
| Your problem | Number or channel | Notes |
|---|---|---|
| Membership or a warehouse purchase | 1-800-463-3783 | Weekdays 8 a.m. to 10 p.m. ET, weekends 8 a.m. to 7 p.m. ET |
| Order placed on costco.ca | 1-888-426-7826 | Have the order number and delivery date open |
| Technical help or warranty | 1-866-231-9731 | Daily 8 a.m. to 11 p.m. ET |
| Written request | costco.ca, then Customer Service | Useful when you want a record |
The warehouse return counter comes first
For a warehouse purchase, walking back to the membership counter is normally quicker than calling. Costco's own electronics page lists 90 days for items such as televisions, computers, cameras and drones, and many other goods have no fixed return deadline. Returns without a receipt are often possible because purchases are tied to your membership, although a receipt speeds things up. Policies change, so confirm the category you are returning on costco.ca before you drive over.
Bring the item, the packaging if you still have it, and your membership card. If a staff member refuses, politely ask for a supervisor and for the reason in writing.
Disputes about costco.ca orders
Online orders add a delivery step, and most disputes happen there: late deliveries, items damaged in transit, or a refund that has not appeared. Keep the order confirmation, the delivery notice and photos taken the moment the package arrived. When you call 1-888-426-7826, state the order number first and ask for a case reference you can quote later.
If the answer is a flat refusal, ask for a supervisor and say exactly what you want: refund, replacement or pickup.
Membership complaints
Questions about renewal charges or an unused membership are handled by member services at 1-800-463-3783 or at any warehouse. Costco publishes a member service commitment on costco.ca, and its terms on membership refunds are worth reading before you call. Check the current wording on the site rather than relying on memory, because membership rules are updated more often than return rules.
If Costco will not fix it
- Misleading sale or refused refund: file with your provincial consumer office. In Ontario that is Consumer Protection Ontario at 1-800-889-9768.
- Paid by credit card and the goods never arrived: your card issuer can run a chargeback. Our chargeback guide shows what evidence to send.
- Larger amounts: Small Claims Court. Ontario's limit is $50,000, explained in the Small Claims guide.
Describe the problem to Asya and get a Costco-ready complaint with your order details in the right place.
Draft My Costco Complaint →Frequently Asked
What number do I call for Costco Canada member services?
1-800-463-3783. Costco.ca online orders are 1-888-426-7826, and technical and warranty support is 1-866-231-9731.
When are the Costco Canada phone lines open?
Member services runs weekdays 8 a.m. to 10 p.m. and weekends 8 a.m. to 7 p.m. Eastern. Hours can change on holidays.
Can I return a TV or computer to Costco?
Costco's electronics page lists 90 days from purchase for categories such as televisions and computers. Check costco.ca for the current list of categories and exceptions.
Costco did not refund my costco.ca order. What can I do?
Call 1-888-426-7826 and ask for a supervisor. If you paid by credit card and the issue is not solved, ask your card issuer about a chargeback.
Big purchases and warranty help
For electronics and appliances, keep the invoice and the model and serial numbers somewhere you can find them. Costco's Concierge Services page describes technical support and warranty help on select items, so read what covers your product before you call the technical line. When a repair drags on, ask for a written timeline and the name of the person handling your case.
Sources & Verification
Phone numbers and hours were taken from Costco Canada's customer service pages.
- Costco Canada: Give Us a Call
- Costco Canada: Member service commitment
- Ontario: Filing a consumer complaint
ComplaintCA is not affiliated with Costco. Return windows and membership terms change, so verify them on costco.ca. General information only.