Bad Service

I am so fed up and angry with their service, its been almost 3 weeks that my car has been taken for repairs, ( To replace my oil sump) till this day i have not received it

spoke to the lady in charge of my car and she kept telling me its with the mechanic and that she would call me with the updates but she never calls instead i am the one who keeps calling to check on the progress. Today i called she told me my car is in disabling. my courtesy car is expiring on Friday and i told them the will be liable for any further expenses I incur regarding the car hire .