Vodacom Debited my account 3 times!!!!

My Vodacom debit my account 3 times last month, and I have sent them invoices and statements and had no reply from Vodacom!!! this is unacceptable, they are happy to withdraw the money from your account very easily but not to return money that is owed.<br> <br> I also called to find out why my phone bills are so high every month when i dont use over the amount in my contract and I found out I also have another insurance for my sim card or number on my account which I never aggreed to and sined no papers!!!