Have I been **********? Will I ever know?

<p>In December I renewed two MTN contracts, one for a data account. As soon as I got home I received a message saying the account (all three sim cards) had been suspended as I had "exceeded my credit limit". Coincidence? Fault on the system? No amount of enquiring what this meant resulted in any explanation. I then received an account for the data sim for R2873.32 plus VAT, which was taken by debit order. At no time did the ****le we use on this sim indicate that we had exceeded our monthly limit of data. And now three months later and many calls and reference numbers have produced absolutely no result. All I want is that MTN produce proof that I have run up this amount, or refund me the mistake . How hard can it be MTN??? This is really poor customer service. Shame on you.</p>