BAD SERVICE

My name is Tamme, I took my vehicle to Graff Brakes in Randburg for brakes pads replacement. The same day after I collected the vehicle, handbrake lights started flashing and noise on drivers side wheel was making horrible noise. I took it back, and they alleged that front discs were not skimmed well. They skimmed them again but still there is no different. What pains me was when I realized that there is missing lock nut, they promise to check footage and they'll come back to me but I never heard anything from them again. Now I'm forced to buy ful set of lock nuts since and also fix handbrake light. What a bad service