settled account only to be told iam still

I received a settlement amount from Thapelo Eugene Mokoape and a settled the amount on the 24th March 2016 and i have been waiting to receive a paid up letter because am avoiding the fact that few years from now cell c will say i never settled the account since they are capable and when i send an email to Thapelo Eugene Mokoape for paid up letter since i settled the account he replies and say <br> \if perhaps there's any outstanding usage it will be payable during the month of April which will be your last and there shouldn't be any other debit orders thereafter, thank you for choosing Cell C\"<br> Imagen how they give you settlement only to be told that you are not settling and they mite be an amount that you need to pay and when you asked for settlement that was not mentioned on the email <br> "