unprofessional service by call center operators

I was informed that my contract will be expiring, I contacted the call center asking what will happen if I don't cancel my contract as i'm receiving 5GB of data and 100min for R420, I was informed that i'll be getting, 1GB of data and 100min for R99. I phoned about 4 call center operators and was informed the same. The first month after my contract expired I paid R99, but now they are billing me R649 without even informing me. I spoke to the call center about this, and was informed that this amount will be removed within 7 working days. 7 days has passed i phoned again and the amount has not been removed as promised, now they saying 20 working days as i intent purchasing a property this will influence my credit rating.<br> <br> I also emailed my cancellation form on the 5 January 2016 but according to the call center staff this will take 20 working days, if i was informed correctly i would of cancels my contract immediately. <br> <br> I feel the call center staff is uninformed and cant provide the correct information. <br>