Vodacom in breach on contract - **********

I upgraded my Vodacom data contract on Thursday the 26th August. As part of this upgrade, I was offered a Takealot voucher which would be sent within 2 days of accepting upgrade. Since then, I have tried continuously to follow up on this voucher which to date has still not been received. I have been told its been escalated and escalated and they never get back to me. The voucher has not been received yet my account has been debited today which is clearly a breach of our agreement.