Workshop manager attitude

Frank Vos Delta (Worcester) have the agency for suzuki. My wife have taken my suzuki jimny for repairs (funny noises, loosing power etc). She took a drive with the manager and indicate the problems and he acknowledge. After 1 day the workshop manager called my wife and request she must drive with him for according to him the problem was fix. She refuse and told him that they must fix all problems and deliver the vechile asap. The manager now want to forse my wife to take a drive with him. He indicate until she drive with him he will not deliver the vechile. The workshop manager simple refuse to listern to what you as the client say and make comment and only have it his way. Seems like he either jave attitude problems or want to forse my wife to take with him ( for what reason i simply dont i derstand). She is not the mechanic. They are suppose to be. I phoned the workshop manager myself and he told me theres 20 more funny noises on vechile but he simply cant fix problems that i am not aware off. This vechile is still under maintenance plan. The workshop manager say somethings quickly and than he realise he said something wrong and recover very quickly but saying something else. Even after i have spoken to him on the phone he refuse to release the vechile up untill my wife take a drive with him. How is this possible, can workshop managers force people to do something or the dont deliver your car that you are paying installments on. I work across border and have to do things via Telephone.