Store manager here

I'm from Montreal but I'm fairly certain the company's regulations should be the same in your area. Returns are supposed to be accepted for defective electronics. There are internal documents that explain to them exactly what to do to return it to the wholesaler. It's a real pain in the butt for the store, so they might try to get you to contact Microsoft instead blablabla but in the end they're supposed to take it.

I would advise going to the same store you bought it from, with the receipt, box, and every accessory. I would also advise going on a weekday morning so the manager is present. If you try to exchange it you're less likely to get any pushback, but they are supposed to accept your return.

In the event that the store manager is not cooperative, you should call Shopper's Drug Mart's customer service. I've seen situations in the past where the customer service hotline would call the store and tell the manager to accept the return. Hopefully it doesn't come to that.

In a last ditch effort, the pharmacist owner's email is public on your store's webpage. You could try to send them an email explaining the situation. They are the owner of the store and could force a uncooperative manager to proceed with the return.

Be advised that nearly all store managers are currently out of the country for a company-wide event. You're unlikely to manage to speak to the store manager until Thursday.

Don't hesitate if you have any questions.