Motus Ford Germiston- watch out for Moses!

I bought a second-hand vehicle. Upon studying my service history I realised the Motus Ford Germiston had serviced the car previously. The first time I took it there for service was fine. Troubles started when Moses started dealing with me on the second service. After collecting the car I could tell that the car was performing differently to what I was used to. It also gave me a service-required message. I took it back to inform Moses about this, he claimed that the mechanic forgot to set up the computer. I drove for months with a car that wasn't sounding well. I retook it for service and Moses told me that the diagnostics report says they need to change the oxygen sensor and catalytic converter. I declined this and went to get my car, upon requesting a diagnostic report and a stamp for the service, he referred to Mbali for the stamp. Mbali then tells me that she didn't stamp for the service because she can't find it on the system. I produced a receipt of my service and she reluctantly stamped it. This is not even the whole story. That place is run by a bunch of ****** pretending to be professionals. Even up to now, I'm yet to receive my diagnostics report from Moses, he keeps sending me quotations instead of the report.