Paid a fortune for a job not done

I took my bakkie to SA Performance to have the manifold repaired. Took it back 3 times still not fixed. I then find out Rose from SA Performance placed gaskets on it to compensate for the warp which I was never told about. He then sent it in to be skimmed, came back grinned and not smooth. Rose kept on its the turbo, which I replaced myself, still the manifold did not work. I paid R4 300 for what exactly? I was blatantly I **** to cheated and **********. I want the manifold repaired or replaced as I have paid for what exactly. Rose said the turbo had to be stripped, the turbo is NOT the problem, the fact that the manifold was warped is the problem all along, but SA Performance and Rose conned me. They are supposed to be professional. A new manifold costs R4 100 from Mitsubishi. They have to sort this out and do what I paid for. No wonder nobody trusts anyone anymore these days. Its due to people like SA Performance who do half jobs rip people off and place the blame on the customer. Its unacceptable and disgraceful. Rose you will sort this out and fix what I paid for.