R999 cancellation fee

2018 I took up a rain wifi with afrihost and never had any problems with them till recent when I started having connection problems. I called in to make enquiries and was assisted and advised by an agent named Mthobisi that the rain towers where congested instead of cancelling I can take up another wifi with Telkom. I agreed to that and was assisted by Mthobisi to cancel the rain wifi and take up the Telkom wifi over the phone..1 month down the line I had a dispute with afrihost about the wifi then I opted to cancel the package, called in to cancel the package then I was advised that they cant do it over the phone I'll have to do it on their app which is what I did. A couple of weeks later I recieved an invoice from them stating that I'll have to pay R999 because I cancelled the promotional package within a month. I called in to explain to them that I took the package over the phone assisted by Mthobisi one of their agents and he never advised that this is a promotional package and if I cancel within a month I'll have to pay the R999 i also explained that he never read any terms and conditions that comes with the package therefore i never agreed to anything but the monthly premium , I also explained that a week after taking this package I had a prorata dispute of which they had to pay for it because that was also never explained to me. I've been calling them for over a week now asking to speak to the manager about the dispute but every time I call in firstly I will be told that I have to pay the money because I agreed to the t&c of which I never did then I'll be told again that they still investigating my dispute but either way whether I agreed to the t&c's or not I'll have to pay money, then they will tell me that Mthobisi they guy who assisted me to take the wifi would call me and that they still listening to the calls. When Mthobisi finally called back he apologised for not stating the t&c's and for not explaining anything about the package and that even if that's the case I'll still have to pay the money, I asked to speak to his manager and he also advised that they are still listening to the calls and they will get back to me...the last call I made was last week Friday spoke to Eric and explained my story to him and without any hesitation he immediately said I have to pay the money as well without even enquiring with the accounts department about the investigation then he later told me that there are no voice recordings attached to my query which means no one requested for the call recordings for my dispute to be investigated and he will try to send that request for the 1st since I've been trying to get this resolved for over a week. Just to mention the agents that I spoke to Mihlali, Mathapelo,Eric, Mthobisi, Sipho, Sam just to mention a few and not even one of them was able to transfer me to a supervisor as I also requested them to send me an email that had all the proof where it states that i agreed to the cancellation T&C but never got one even when i asked them to listen to the last calm Mthobisi made where he clearly states that he never explained the package T&Cs including the cancellation part they still refused and said Mthobisi will call me back..even today I'm still waiting for their call.