Telkom Wifi very bad service

I upgraded my Telkom account last year logic when you upgrade the previous account should be closed now telkom has given the account over to nudebt and R800 has been added to the account so now the R200 is R1238.53. Logic again when one contract is upgraded should you not let the client know there is an outstanding amount or transfer the outstanding amount to the upgraded account please just note the service number never changed so i do have wifi on the upgraded account but they taking me to nudebt on the old account and on another account there is a minus 600 and something rand but this just gets put aside please someone help.