Contract not cancelled since request was done at the end of March !

Since March I have been trying to cancel my contract. Vodacom has deducted money, changed my contract to a lesser amount and that the end of it. I cannot understand why it is so difficult to cancel a contract and reimburse me the money deducted because you could not do your job. For you, the case is now closed. I will continue to comment on your bad service until someone assist me with my original request. I got a WhatsApp to say it will happen at the end of this month, September. Really? Another month waiting , another deduction ?