MTN FORCING ME TO PAY EXPIRED CONTRACT

I RECEIVED A CALL FROM A DISRESPECTFUL CONSULTANT FROM MTN ON THE *** ON THIS NUMBER ***, WHO WAS FORCING ME ACCEPT THAT I OWE MTN. BUT WHEN I ASKED HER TO TELL ME THE MONTHS WHICH I DEFAULTED SHE COULDN'T'T SAY, SHE JUST SAID THE SYSTEM SAYS I OWE FOR 2 MONTHS,<br> HOW DO I PAY WHEN THEY CAN NOT TELL ME WHEN I SKIPPED PAYMENT. SOMETIME IN JUNE/JULY THERE WAS A CONSULTANT WHO CONFIRMED THAT I HAVE FINISHED MY CONTRACT(*** &amp