WORSE SERVICE

I have a RAIN modem at my place and I app**** for a second one where I a currently working at. I however did not get a signal and after a very terrible service from RAIN to try to rectify the signal problem I canceled my second sim. After 3 weeks of trying to get them to collect the modem so that they could CREDIT my account with the amount I now see that this was not done and both AMOUNTS REFLECTS ON MY BILL??? The modem was collected on 27 July so there was ample time to rectify this. I have mail to indicate that they would credit my account. I have now paid the R499 and I am trying to phone the call center to get them to connect my service again but the line keeps on dropping. SO CAN SOMEONE FROM RAIN PLEASE TELL ME HOW A CUSTOMER GETS HOLD OF YOU GUYS TO SORT OUT A PROBLEM!!!!!! THIS IS REALLY BAD SERVICE