bad service

On 24 March 2015 I took my car to lyndhurst auto for the back headrests, navigation system, sunroof windnoise and brakes to be sorted out. Got my vehicle back on that friday at 18h00 and was told the brakes are squeeking and I need to bring the car back no mention of nav or headrest. Driving back home to Mafikeng realise the nav and headrest not working. Called billy the Monday morning and he told me will check when I bring the car in for brakes. Bring car back on 13 April only to be told headrest motors need replacing and nav system to be sent in for repairs and, need to bring car back again after 2 weeks. Brought my car back 11 May, all I get is we are busy initializing the vehicle, called again and billy took a clients car for test drive phoned again got hold of billy tells me he is in a meeting will call back. What kind of meeting was he in with so much background noise. Billy you are a foreman working for a big organisation stop lying to your clients, without them you wont have a job. As for BMW why do you not respond. I have in the past complained to you directly with pictures of poor workmanship by one of your dealers. Come on BMW SA dont be such ***ARDS and respond.