Cellphone contract.

Hi there, I would like to share this bad review I have with Vodacom. I have upgraded my cellphone contract with them last year and we agreed upon a certain amount. But now they are deducting more than what we agreed upon our contract and it has been happening for quite some time. I did escalate the matter with them and I was promised that this would be rectified. But there they are, the issue at hand still not being resolved. I am not a happy customer at all.