Bad service met with aggresion

I will keep this short. The Car Shop worked on my exhaust. I complained about my exhaust knocking. Instead of trying to sort out the problem some bloke named Steve said that it was my fault that my newly repaired exhaust was knocking. I asked him take a look at it and this was met with an extremely aggressive response... I did not wish to get into a physical confrontation so I opted to take my car to a reputable exhaust repairer, and it turns out that the repaired section of exhaust was too short and was knocking on my suspension. <br> <br> HOW IS THIS MY FAULT? <br> <br> HOW CAN A COMPANY GET AGGRESSIVE WITH ITS CUSTOMERS. <br> <br> Beware Jeep Owners