Vodacom double billings!!

So i took out a cellphone contract with Vodacom. The first month of having the phone my bill was normal. The second and third month i have been receiving bills of double the amount. I contacted Vodacom customer service and they told me that i subscribed to game mine and made purchases aswell. I haven’t subscribed to any services but i am being billed for this it’s ridiculous and customer service can not help me I reversed my debit orders from Vodacom and only paid the original amount of the cellphone contract!!! Waiting to hear from Vodacom!!! I read up on this matter and found out that alot of vodacom customers are in the same situation, being billed for services that they did not subscribe to. I will not make a single payment on my contract for any subscriptions except for my original contract price!!