Stay away from Amtec Bosch servive centre in Vereeniging

Wife took her car in for quote on repairs. In the morning when she starts the engine smoke was visible at the exhaust for a while and then it was fine. When she took it in they wanted to see the smoke and she explained it was only in the morning when she first started the car. Told her to leave the car for the night and they will check the next morning, She was informed by the mechanic that they need to open the engine to see whats wrong. Got a quote for R17700-00 as apparently the valve stems had to be cleaned, the crank had to be polished, the head had to be pressure tested and what have you. They promised the engine would be like new and the problem sorted. Only wanted to give a three months guarantee but when we told them we will take it somewhere else, they agreed to 6 months. Said we will have to pay R2000-00 if we do not accept the quote. Four weeks later, after taking the car back twice, it is now smoking even when you start it during the day. We were told it is now black smoke and not white as before so they did their job. According to them the case was closed as it is an old vehicle and all models of that age smoke. Its a 2005 BMW320i. The next day i mailed them to request copies of the parts quoted for and they ignore me flat-out. They also do not want to accompany me to BMW to show that vehicles of a 2005 model do not smoke and this is not normal as stated by them. I want to take my vehicle to AA to check if the job quoted and paid for was actually done because why refuse to give me copies of the parts invoices. I will not even take my wheelbarrow to them to service and will warn people about this service centre as far as i go. Wrote to Bosch Africa and i am waiting for their response