Is Nanjing's wealth reliable?

This company is unreliable and dishonest at all. I helped them advertise, and then the manager said that they could issue an invoice to the company for reimbursement and then pay us. But the invoice was issued, the money was not fully settled, and thousands of dollars were still owed. It's been almost nine months now, and then he called the manager, but he didn't answer our calls. He also deleted our company's WeChat account from their friends and included it. The manager said that the company owed us money, not him. He has been contacting us with so many materials for advertising projects, and he asked us to do it. Now he is always evading, irresponsible and always shirking his responsibility, so he has to swallow thousands of words. What else can he believe? Everyone should be careful not to be fooled.