No Service after a New Port In..

I Nigel Roets ported to MTN 17 June..I tried to access the Internet and even loaded a uncapped bundle the same day and purchased a 100MB bundle..I could not download anything after all my settings was setup succesfully and when I called 173 and spoke to Itumeleng she did not even bother to check or assist me and just referred me to 083155..what kind of service is this??when i try to call 173 or 155 they keep on cutting me off and sometimes there is no option to speak to a call centre agent? I think this might have been a mistake to port to mtn after this poor service...please can someone call me back on *** to assist and explain?