Poor service in Benzetech Rustenburg

I send my car with gearbox problem and on 30th of July was quoted R17500 in total.It took them a month, they then called me to fetch it. The car droves 5 day after it was fixed and do the same thing, i then returned it back. They took another month but on the collection day they told me that if it does the same thing, i will be charged because they are suspecting that the clutch plate is damaged. I again drove the car for 5 days and it did the very same problem. The owner Jaco is unreachable through calls and whatsapp and they don't respect customers.