Swedish auto bad news

Took my daughters c30 for service, when we collected the car, we noticed an oil leak on garage floor, when contacted Mike the workshop manages was told to take back so they can check, the report said that the seal on gear box needs replacing which we said to go ahead (sure this should have been picked up on the service?! When we collected the car there was a really bad vibration when I highway, contacted Mike again, he collected the car and reported that the side shafts need to be replaced. My point to Swedish auto was that if they did repairs on the gear box that the side shafts would have to be removed, to this they confirmed that the shafts would have been removed, my responce to this was if you took the shafts off why did the “technician” not check them?? His response was “I’m not sure!!” As the car was driven before repairs the car was not shaking caused by the side shafts, I think that when gear box was put back together and the side shafts put back, they did not tighten the bolts correctly causing the shafts to come loose, this is exactly bad service from Swedish auto To add fuel to fire was told the aircon was damaged and needed to be replaced I took it to air-con specialist and all that was needed was to be re-gassed which they did, and didn’t even charge me!! Nice one Swedish auto?!!! Peter tuohy