My biggest regret for taking the contract from Telkom

I took this contract mobile wifi from them in March 2018 which was that R139 special for 10G per month. They never debited the premium from my account then in May i get the message that my account have been handed over to Nudebt for collection. I went to enquire at the shop but they told me they only deal with sales and markerting not the payments issues.i phoned the call centre and assumed my problem was sorted out and even agreed to pay it manually for April.then on 18 May my account was debited by that Nudebt.when i get the monthly invoice its stil having that amount that i owed its like i never paid anything. This Nudebt keep on sending messages about litigation,notice of summons,bad record at credit bereaus etc.its so tiring.i phoned the call centre again and spoke to Busisiwe who opened a case a gave me a case nr.within 72hours i got a message my case has been resolved. Then for the month of June i also paid the account manually as she instructed me.then on the 19 June 2018 i received a message from telkom that my account have been suspended. Again i called call centre to enquire and spoke to Lebogang n i told him that i am so fed up i want to cancel this contract. He cudnt help me but refered me back to the shop.when i get there they said u can only cancel online because that service has been taken away from them. Then they told me i owe R118 but the guy from call centre said i owe R259,13.i just dont know what to do with this reali.i am so fed up i never got any joy and its only 3 months with this service provider