Rex Differential Gearbox Sucks

In 2021 I took my car to vw dsg to RDG on otto volek road durban with a a noise coming from the gear box, they made pay for a gearbox and changed my flywheel but upon getting my car bak the sounds were gone for two weeks then started again, i took it back and they kept my car for almost the whole year busy telling me that its a flywheel problem which they could not fix and didn’t fix. I suggested that they give me back the flywheel so i can take my car to vw to get it properly done but they refused and just kept saying i shud bring it in again. They could not change a simple flywheel so why would i take my car back there. What ever you do never take your vehicle to Rex Differential Gearbox they are worst,