Very bad staying experience. During my stay, the v...

Very bad staying experience. During my stay, the valet charged me $30 for using the valet service, which I didn't even drive a car or used the service! Somebody must used name, my room number or lied to them, or there's some system errors.
Called guest service AND valet team multiple times during my stay after I found out about the unknown charge, and at beginning they said there was an error they will remove the charge. But after I checked out from the hotel, I received another notice from them stated I used the valet service so I have to pay for that.
Called guest service manager again and he said they can't do anything about it since the valet manager after investigation decided the charge was valid. Called valet team manager multiple times, left multiple messages, but he never answered his phone or return left message. And guest service manager said I can only dispute this charge with my credit card company if I think it's invalid.
Strongly suggest other people think twice if want to stay at this hotel, there are better option and I had better experience with other hotels. Seems like recent management and guest service quality went down by a lot. Even they made mistake, they don't apologize or fix the error, instead they caused more trouble for customer to file a dispute with their credit card company.
Update:11/29 got a call from valet manager said they will reversed the charge and do further investigation.