Damaged parts, lost parts, sloppy workmanship

Took out BMW for a repairs to MTech Services Durbanville Ind Park. Car went in on 01/12/2015 and we were told the repairs will take at the most 5 working days. We only got the car back on the 17th after numerous calls and visits from out side and empty promises from Martin. The car was only ready at 22H15 on the 17th after we have put some pressure on Martin as we needed the car and was battling with transport. OMG!!! and what a disaster!!! He connected the water pipes wrongly nearly flooded the engine block/head with coolant,battery terminals loose, oil filter loose, samp plate missing, head *****s loose and stripped, radiator loose, manifold bracket missing, damaged new viscous fan and new water pump we replaced before, the list of damaged missing parts and sloppy workmanship is endless. We went to his workshop in person looking for these parts and to get answer he simply shift the blame to some one else even told us that IF the parts were there he would have fitted it. He is not taking responsibility for his sloppy workmanship what so ever. We now taking legal action . Enough is enough. Costing us extra to replace and fix missing and broken parts. BAD SERVICE !!!!