Vodacom ********** Deductions

I emigrated to Europe in May. At the beginning of June I contacted Vodacom to cancel my contract. I was told there was an early penalty fee that needed to be paid. I paid the amount and received confirmation on 9 June that my contract was cancelled. At the end of June I was debited R57.50. At the end of July my account was once again debited R951.50. I’ve been trying to contact Vodacom and I’m cut off because my number is “pre-paid” but I continue being charged for a contract. No reply to emails either to the department that confirmed cancellation