Account in arrears

I registered with Mancosa in April for January intake, i opted for the 9 months payment plan, which i have been paying from date of registration.

Now first semester has passed and am awaiting results and i am informed my account is in arrears, how is my account in arrears when 9 months has not passed and i have not missed my monthly payments, the letter received after registration stated i have to pay the full amount by Nov/Dec.

Can someone please explain how this works as the student advisers are very rude and not helpful.

Thank you

Fikile