Very dissapointed

I have a contract with telkom . Wen i changed my banking details i cslled in and the consultant told me they won’t be able to deduct the money from my new account and that i have to pay manually.i then paid manually and the following month they couldn’t debit the money and no one called me to tell me that instead i get a message and calls from nudebt to say my account is handed over because I didn’t pay. I went in to the menlyn branch to ask what is going on and they logged a call for me,immediately when i left the store i got s csll from the billing department and the guy i spoke to checked my profile and saw that the consultant did put in my new account number but never saved it..so i asked him if that was my fault and he said no and he will despute the charge back fee and i got a message with a case number ********** 3..i then went went to the bank to pay R500 manually and later i got messages fro nudebt to say the amount of R239 is outstanding, i told them i paid telkom and they asked me to send my proof of payment and i did that..later in a week i get message of demand to say i need to pay my account, i called Telkom and the guy that helped me told me that i need to pay 180 something rand and i asked him for what and he said that’s the outstanding amount and i asked him what happened to the despute and he checked my profile and he spoke to his team leader and said he is going to send an email and within 48hrs hopefully the matter will be resolved and that he will follow up .and i asked him now how are is my name going to be removed from nudebt as it’s getting ruined and he says once they credit that charge back fee then all will be well, I believed him but today I received a message from nudebt and the amount is R424.16

Can i please get clearity of what is happening as this is draining.