Fed up with bad service!

I'm going over to the 4th service provider after being with MNT,Cell C,Virgin..at first i waited almost 7 weeks for the phone i wanted...then the response time for porting my number took almost 4 days...then my crdit check was declined. After providing the appropriote documents to verify that im clear..i then have to provide bankstatements AGAIN...being told that this will sort the problem. Its been a week and no response.I had to phone twice in the past week myself as was with previous weeks as well!i have had my my new phone for a month and atill cant use it due to lack of response!!! Im fed up!!Really dont know what else i must do!Keagan,the consultant, just say that he himself have difficulty with the call centres and people he must phone to get everything sorted out....but really!!!!