Very bad workmanship

These guys have absolutely no clue how to fix an aircon system. The vehicle is question was with them in November and again about 2 weeks ago still the aircon doesn’t work properly. They also charged twice for the work done. The second time I went there I noticed lots of people bring their vehicles back due to the bad workmanship. They also take 4 full days to diagnose the problem. Very very very unprofessional and ***********.