Account dispute

In April I paid my account via the Vodacom app using my Nedbank Cheque card. I was debited for the same amount on the 03rd of April. I cancelled/reversed the debit order from my account since payment was made via the app (please see my bank statement attached). Needless to say, the payment on the app has not reflected and my line has now been switched off. I have contacted the customer care department numerous times trying to sort this out. I’ve emailed the same bank statement to *** as well as to the supervisor on Friday. My line has not been switched off again, I phone the accounts department and the consultant put the phone down in my ear. I phone back to speak to a manager/supervisor and the person has not phoned me back. I understand that if you don’t pay your account you’re line is locked but I paid the account, I’ve provided proof of this. It is not my fault that the app did not register the payment. I have tried sorting this out since April to no avail.