CellC is overcharging me! Still no answers...

My balance was sitting around R1248 last week, and I phoned in on 25/3/15 and spoke to Rachel at the call centre (Ref ***). I'm on the Infinity Select AnyNet package (with a limit of R50), so this should be R999pm (and at most R1049). I was told that I was charged the additional amount for cancelling the OneNet package in February. But the only reason I had to swap to AnyNet was because of an error on CellC's part. Unknown to me, the woodmead branch consultant signed me up on the wrong package. I asked Rachel to sort this out before my account gets debited, but it seems like CellC doesn't care about customer service, I was debited anyway. Blanche Opperman from Escalated queries helped me change my contract to the correct package, and I emailed her on 27/3/15 to ask for her assistance. 1 week after my initial query, no response from CellC, no response from escalated queries. I am highly disappointed with the lack of professionalism from a service provider I once thought was great. I won't think twice about paying higher monthly charges and moving over to a service provider that doesn't slip additional charges into my monthly payments. Disgusting service, or lack thereof.