Sorry to hear of your drama's. Earlier this year I had an independent garage fit a new slave cylinder, braided line and high temp fluid. All new parts I had supplied and after a longer than normal period the clutch pedal was at the point whereby I could drive home. That evening I went to go fill the tank (some 6 hours after the install) ready for a road trip the next day with several lads, that I had arranged. Started up the engine and couldn't get any gears, great!!
Ended up having to leave the car on the driver and hop in with the brother in law. Had been planning the trip for weeks and weeks so wasn't best pleased. Once back I made the decision to repair the vehicle myself. My little brother was gutted also as it was a garage that he would normally use with no issues and the labour costs was at mates rates. My brother offered to go back and have a word, but I thought leave it. The mechanic is trusted and tried his best at the time to carry out the install, but ultimately I tried to get a cheap job done and you therefore run the risk of errors with little come back. Lesson learnt, sometimes buy cheap pay twice or more.
On reflection I think what happen was for a reason, the conditions for Mid/North Wales in April were shocking, I would have been leading the convoy as I often do and very possibly could have crashed not allowing for the conditions and seriously injured myself and/or others.