Took my Alfa Romeo for their free air-con diagnostics. Staff were friendly and told me it would be about an hour and a half. Went back then and it was ready. They had checked the system for leaks and all good but it was very low so they had topped it up but done so without calling me for consent. It was £50 and I wanted it done anyway so I didn't say anything but bad to do work without approval. Car was nice and cold on the 20 minute drive home but next morning no cold air. Called them and they said there is obviously a leak (well yes I guessed that!) but they could not explain how their system did not detect one the previous day when they tested it. Took a lot of arguing but they agreed to refund the £50 then told me I should get the car to a specialist for an aircon diagnostic!!! Useless.