Can you give me some suggestions for these sentences?
I don't know how to cooperate with a person who provide bad after service, just appear when you have a order to him. The problem happened, he gone.
我不知道该如何与这类人合作,他们提供糟糕的售后服务,只在有订单的时候出现/积极回应,有问题/困难发生了,他们就消失不见