Fails to send an account, then blocks my phone

Cell C is supposed to send me an account each month where after my work settles such account.<br> <br> The failed to send me an account for September and have now proceeded to block my phone for nonpayment of an account which I do not have.<br> <br> How exactly am I supposed to pay for an account which is not in existence? Even on their website the account is not logged on to my phone account.<br> <br> Cell C, your service is terrible, I have had countless problems with you for the past 18 months. Once this contract expires you will not receive any further business from me.<br> <br>