Rude garage Owner

I was at the garage for my car to be washed and there was no chair anywhere in the shade so I decided to ask for a chair and sit somewhere else as the the cleaners were busy sweeping in the Lapa and it was dusty..I don't know if it's the manager or owner asked one of the workers Why am I sitting against his wall? I was on the phone at the moment I hanged up and asked if there was a problem and he told me I'm seating where I'm not to..well no one told me and the manager said the was nothing wrong...so he started swearing at me with the F word and told me I'm stupid I told him his rude as I'm a customer he supposed to treat me with respect...I'm not happy with the service and wen I find out from the staff that that's how he treats his staff aswell I just left.i