Probably you need arbitration

Read their contract, all dispute has to go through arbitration.  That's standard 霸王条款

And then read their arbitration instruction.  Write it up and mail it to the arbitration listed on the contract. 

所有跟帖： 

• first time to hear about arbitration. 谢谢。 但是我的收据都没有了。 -keeplooking- ♂ (67 bytes) () 03/22/2022 postreply 08:47:57

• At least you have to try. -柠檬椰子汁- ♂ (149 bytes) () 03/22/2022 postreply 16:15:19