Correct your mess up fnb

I took a payment break for two months a few months back due to covid , I was told that I would get the break , after on my document it stated I would have 1 year extra on my bond and after the break intrest etc would be reviewed and adjustment would be made to debit order to include intrest costs , now I have never missed a bond payment , I have a outstanding amount of 11000 that is on my bond in arrears , I have been asking since jan what this is with no answers and now I have been contacted by a outside company wanting to valuate my property , how is this my fault , wher does the 11000 come from and why was my debit order not whistled to Accomadation this 11000 , I am shocked , my private banker can’t even assist me