Double payment of balance

I received a statement from this attorney concerning outstanding account of R 1 142.70 plus cost amounting to R 2 292.77..I paid the R 1 142.70 which reflected on the statement, and on the next account it has not been subtracted and the amount went up R 3 028.63. This means I pay the original amount twice, which in my eyes is *****... Please be careful when using this attorneys in Kathu as they make money charging people double....