Pathetic service

I am very disappointed with the service I recieved from Audi Arcadia, towards the beginning of the month I noticed a brake light warning light coming on , This came as a shock as I was told the brake pads were changed on the previous service , i have also stated numerously that my car has a delay on take of , I was even provided with a technician to test the car along with me by the name of warren on which he advised that the car is vibrating and it could be the clutch or gearbox but nothing was done about it , my locknut was even stolen from the car , my car is now out of motorplan , but all the things I reported went being attended to while my car was still on motor plan but now that the motorplan is expired i am even offered a technician to have a look , my question is why were these things not attended to while my car was on motorplan?