General supermarkets will have a promise of unconditional return for several days. You should be able to do this. If you really don't want it, then go to the service desk. Be sure to emphasize that its promoters are deliberately misleading and tough, and ordinary supermarkets will give you a refund. If you think other brands can buy another one.

Specific requirements. Generally, supermarkets will retreat in order not to affect their image. Lasting.