SuperQuick Midrand Poor Service

I took my car (Golf 7 GTI) for a shock absorber fitting apart from the shock not being fitted properly (not tighted) my abs sensor was damaged and Qbond was used for an electric connection. My car went in for a shock fitting and came back with multiple warning lights. I got appaling worksmanship after having told them that I have a long journey ahead they still persued and didnt even properly tighted the shock properly now I have a damaged CV boot and they refuse all responsibility regarding their repair.