Bad Service

Dear Vodacom,

Iam very unhappy regarding my query i raise in regards to my Contract Billing. i have been charged more than i have signed up and excess funds keeps on getting deducted from my accounts. i have now repsorted this on numerous occassions and the case gets closed without communication and telling me what the issue is or why i am being charged. i need this resolved or atleast have an answer soonest.