I just want to say that I hope this experience can teach you that no matter what you do, you should consider being cheated. What should I do? Only by considering the worst, even if the worst happens, it will not fall to the bottom. My personal advice to you is to take a recording pen and talk to the person in charge. You must be fully prepared, such as making a draft and writing down everything you want to say, so as not to forget everything you want to say when you are excited. Because you want to record it as evidence, you must control your attitude. As long as you are reasonable and have evidence, let the media help you. We all have our own local news channel, but I think you can tell them during the negotiation. If it can't be solved this time, consider exposing them to the media and see their attitude. As long as they agree to your terms, the matter will be over. After all, being a media will not have a 100% chance to get a satisfactory solution, right? The last thing I want to say is don't let the other party find out that you have a recording!