mayfair gearbox auto booysens

I drive a 2017 polo gti that has been back at mayfair gearbox for the 5th time first, over charging me to replace the megatronics and clutch R64K later, went back because my car lost a lot of torque as if the clutch is slipping, 2nd time same problem, 3rd time same F*&#ing problem, 4th oil leak and 5th the same oil leak and bye the way the feeling of clutch slip is still not gone so i have no time for mayfair gearbox that company can go F them self because that place does not have proper mechanics and technicians doing the repairs HIRE QUALIFIED people for the prices you charge