Fed up with vodacom

I've been struggling with vodacom for ages now and I'm fed up, I'm so disappointed and would never recommend vodacom services to anyone. Every month they just add to my bill more and more, I quarry every month because I do t understand how R900 plus R155 ad up to an amount of R1600 and above every month. I canceled my cell phone cover insurance aswell, they keep on canceling it by them selfs and I need to activate it again so this passing month it was dubbel, I phoned vodacom customer care hundreds of times and after a long battle I just said take the R1613.11 then everything is fine and up to date, so they said I shouldn't worry end September it would be normal and the amount wouldn't be so much, so today I go on my app and there it was again R1400 over how do you calculate this stuff I'm done I can't pay this anymore. No one can help me, now if I end the contracts I anyway have to pay them, plus my kids and family who use internet for school and work Wil be struggling, then it's gonna take months for vodacom to relise the fibre line rental so that I can switch over to another network. I'm fed up