Do exactly what you are told to do and still get terminated

I find it very unfair that I was dropped from debt review after following all instructions. I was paying every month, unfortunately I was paying R300 less than I should have. The amount I was paying was the amount on the last statement I received. I was contacted to say the account was now R4600 in arrears. I supp**** all proof of payments which I made every month as well as the statement I received showing where I got the amount from. I was told I had so many days to pay the arrears amount of I will be terminated. On a call I was told the amount had to be paid by the 19th March. On the 18th March the full amount was paid and proof of payment was also sent. After this I was still terminated and no one is willing to assist. Case number to follow all communications is C-***7