No amount of money can encourage their bad habits.

If they deny that they have delivered the goods, let them show the evidence of delivery.

Pick out your phone number, which can also be used as evidence in case they don't admit to cooperating with you.

Say you're willing to put money in. Such people have no conscience and can do anything.

There should be an order when you place an order, right? Anyway, bring all the evidence that can be related to this matter.

Otherwise, call the consumer association for consultation first. If the shopping malls there ignore it, take a taxi to the nearby industrial and commercial bureau to complain.

Carry out rights protection to the end