Fed up with Telkom

I took out a Telkom contract in August and my monthly instalment which I signed for was R869. The line was an open line and I was advised to change spend limit to R1 so that I don't pay more than what the contract stated, I then reduced spending limit on 25/08 to R1. When my bill came through in Sept I was billed the normal R869, in Oct my bill increased to R969 & when I queried this I was told it was for data usage and I'm liable to pay, it didn't make sense because once my data is depleted I'm unable to connect to the internet and I the connect to my router. Now in Nov my bill says I need to pay R969 again and upon query this I am told it's for data usage, which I'm not aware of as my contract includes 3gigs and once that is used up I connect to my router. No one has been able to give me clarity as to why I'm being charged this extra R100 when I don’t use more than what I've got. Consultant I spoke to said the spending limit was only adjusted 24 October when I called in to Telkom, this is absolutely nonsense because when I contacted them on 24 /10 it was to query my invoice, I need the call recordings to be retrieved because it is apparent that there is some dishonesty happening. I have been billed incorrectly for past 2 months by Telkom for data usage I do not know. I’m currently on the Out Of Bundle option where if data has been depleted it stops internet access and I have connect to my wifi therefore I do not know why they have been charging me R100 every month for data. My contract includes a 3 gig data and minutes. I have not had anyone at Telkom that could resolve my issue, I’ve been promised that a team leader would call me but no one has bothered to contact me regarding my query. These are the 2 case numbers ***0, ***1