Received a bill for around R2k for data

After chatting to Randall and he reassured that my account would be cleared and all I needed was a letter confirming this, and that I should call on Monday, as he attended to me on the weekend. <br> <br> As usual, I've been sent from pillar to post by the call centre. In the meantime, I have received an invoice for over R2k for data. No one at the call centre can seem to access the account or assist with the matter.