Internet Data ISP address conflict LTE Internet

In the first 6 months of my contract the service was working well. It started in May this year I was on leave with my modem turned off.When I came home after 2 weeks my data was up. I do not do downloads that require large amounts of data. Also data is used when I am asleep or working. I have been to Telkom Benoni and was told That I have to report the problem by phone. When I phone Telkom and explain my problem the only reply I get is that the record shows that I have used the data.The more I explain them that I need a technical investigation they tell me that the record shows that I have used the data. The agents are totally ***********, when I ask a question I get put on hold for long periods before I get a reply.I was also told from a Telkom worker that there are no reference of any maintenance been done on the LTE internet network. I know of other customers that are having the same problem. This is a breech of contract, Telkom takes their money every month and I do not get the service that I pay for and for more than half of every month I sit without Internet service.