Rear wiper blade run around

What a day spending hours on the phone asking for a rear wiper blade, first it was the receptionist who tells me the service consultant is on leave but she puts me throug to his phone and picks up the phone again to tell me no one is answering i tel her to put me through someone who can assist me phone goes through to some lady at the service department who later puts me through to the parts department where a gentleman tried to help me only to tell me my rear blade was not ordered its been 2 weeks now since i took my car for service on the 21st and the blade was removed i was told it was approved by my service plan i will get a call the following Monday to get it fitted, the gentleman at the parts department told me he will order it for me but i must pay 1600 i refused i told him they must find the service consultant and tell them what must happen he transfers my call to the manager who took my details and said will call after an hour and never did. Now i need to travel without my rear wiper blade in raining conditions because the useless not caring staff at williams hunt midrand will not assist me in getting my rear wiper blade. I am really disappointed and want that rear wiper blade fitted tomorrow as i am traveling on Thursday