Ridiculous accounts

After my upgrade to a new SAMSUNG handset, MTN did not cancel my Blackberry service and I went on paying for this service until I noticed it last month. AFTER receiving 2 huge accounts with PACKET SWITCH DATA charges. I buy data on pre-paid. so where is this coming from????<br> I am waiting for a refund and I accepted that it has gone through as my account was back to normal this month with a debit order.<br> Only to receive an SMS informing me that I need to make immediate payment? What, why must I pay cash? <br> Where did this ridiculous account come from as my account reflects nothing.<br> None of the info corresponds<br> And when I Try to phone the call centre, my call gets dropped time and time again.<br> MTN is definitely the worst company ever!