why dont they vacuum check the system before a re-gas?? that way they will know if its got a leak or not before they try and pump it full of refrigerant!! bloody kwik fit butchers and bakers repairing cars, there was a day when even experienced car mechanics couldnt touch air-con it had to be a refrigeration engineer that carried out any service/repair work. this cars air con system i would imagine should hold around 500-600 grams of R134A gas, check the vin plate or there will be a sticker on the landing panel, presuming there isnt a leak, if they havent fully recharged the system with the correct amount of gas then it wont work properly.