Aggressive owner with the worst client s****s

Visited Kzn for business parked at a parking lot at the service station went into a dealership when i came back my car was clamped. The guys outside said it has been clamped i asked why they did not answer spoke to the owner which was very arrogant from the start i asked him why my car was clamped he said that i was not allowed to park there i advised him hom would i know that as there is no sign and i stop at other garages all the time never had a problem he said the sign had fallen off i said how would i know that im not allowed parking there if there is no sign he kept on speaking to me in a very arrogant and aggressive way. Always buy things there i will never support them and advise my people also not to support a negative and aggressive business like this if this us the way you are treated.