INCORRECT BILLING

I had cancelled a previous contract with Telkom where a lady with the name NTABISENG promised me that everything will be sorted out. Every month TELKOM bills me incorrectly for my two remaining contracts. My one contract which is the SMART INTERNET 500MB= R249.00 (which includes a DELL LAPTOP + 500MB DATA) and the second contract which is SMART SAVER 100 =R99.00(which includes a SAMSUNG GALAXY POCKET PHONE+1GIG DATA +100 FREE MINUTES). Every month I have to reverse the debit order which TELKOM deduct for R993.70 and then I pay the correct amount of R348.00 into TELKOM'S ABSA account with the relevant reverence numbers for both contracts, but after I had paid in the monies into the Telkom's account then Telkom makes more attempts to deduct money from my banking account. Last week my services was suspended up until now but my account is paid up to date and no-one at their customer services centre can give me answers, they just log the case and promise you that they will get back to and then no one calls you back. I only got a call back from Telkom's social media team the last time I had laid a complaint with HELLO PETER.