Took my VW Jetta in for two issues - transmission ...

Took my VW Jetta in for two issues - transmission fluid change and electrical issue with passenger door. Had my car for over a week. Kept giving me the runaround. Charged me over $300 and neither issue was resolved. Took it to another mechanic who checked my transmission fluid. It was black. Said fluid was never changed. Took a sample back to Carssmith. Gave me all sorts of excuses. Finally agreed to "filter" my fluid instead of replacing it. Decided not to trust them a second time.