My line to is not working.

Hi<br> <br> I have been experiencing problems with my line. I have been unable to buy anything off the 111 menu. I have called the call centres and I have exhausted my limits to the call centre and every time I call they promise it's been sorted. <br> <br> I also sent thru a complain and the call was referenced ***, I have not heard feedback on this one.<br> <br> Please assist asap. I'm losing it thinking of porting. I can't have a line that doesn't work.