Sudden Huge Bill

Hello,<br> <br> My cell phone account has consistently been about R839.00 per month for months and months, however, last month my debit was triple that. My last payment went off on the 1st of July and when I checked my account on the MTN app on my phone, by balance, 12 days into the month is sitting at R3466.59!!!<br> <br> I can't see how there can be such a huge jump in account balance and that in only 12 days!!<br> <br> Normally I would just phone the call centre at MTN, but \due to high call"volumes I hold on for ages and then get cut off!! <br> <br> I would be grateful if someone from MTN can contact me to explain how this is possible and to fix the problem"