POOR SERVICE AND SALES FROM TATA OOSTENBERG

On 21 /09/2017 I bought a Golf GTI 2.OT. FSI cash from Tata Oostenberg two weeks later the vehicle had an turbo failure and a month later has been back for low oil pressure , the vehicle came back and i was told the sump pick up was dirty and has been cleaned and the sensor replaced. In February the rockers came out since then the vehicle has been standing on the 22/03/2018 i had to had the vehicle towed back to Tata Oostenberg at my own cost during the time i had no communication from them ,on my visit today I was told that it was over revved thats why the rockers came out and the cylinder head is beyond repair. Since the vehicle was bought it has not done over five thousand kilometers. When bought we were told the engine has been overhauled . IF THE VEHICLE HAS A LIMITER SWITCH HOW CAN IT BE OVER REVVED.IF YOU ADVERTISE YOU WORK ON ALL TYPES OF VEHICLES WHY IS IT BEEN SEND TO ANOTHER WORKSHOP