Cellphone service charges

My account was cleared in December 2014 and never used again. Since January 2015 i noticed a charge for cellphone services on my e-statement of R19.99. I immediately called the 0860 call centre number on my statement to query it and the operator gave me a different call centre to phone relating to the charges. I phoned the said call centre and the operator stated: 'yes, we are receiving many of the same calls, but i cant tell you what the charges are for, but i will get my manager to phone you'. To date i have not received a call or if so no voice message was left. Feb's statement arrived an again another charge. I sent a email to the addy on the statement & received an automated response confirming receipt of my email & it will be responded to....still no response. Its now March and the charges are accumulating. I received a text message from Edcon to remember to pay my account even though its a small amount. I phoned the call centre today and the operator tried sending me from pillar to post again which i refused and demanded immediate action. He then put me on hold for his manager...15mins passed no manager & still on hold! Fedup I have resorted to this medium & acc to be closed