Cell C is in trouble for ripping me off

I would like to warn people about the cell c lte wifi option that i have contracted. 20gig day 20 gig night. I pay around R450 per month. At this stage I have used very little of what I pay for due to the modem not working. Next modem I get also doesn't work. I then use a second hand mobile modem that doesn't charge but I get some wifi for a moment. Then on returning the mobile one I get given another modem. In the interim I use my LG phone to make a hotspot connection. It worked for a while then no more. For 3 months now I have had no wifi. So I reverse payments at the bank R750 and I inform my local cell c branch. They sent an email asking for a reaction within 48hrs. Still waiting.....6weeks They then take the money again but double itR1500. So I phone their number and explain again that I cannot be paying for something that I am not receiving. So I go and reverse payment again R1500. Then without any communication they just take 1 payment of R1000 and a second payment of R500. I again phoned the branch in Oudtshoorn again today and they said they will get back to me about the situation.....I am still waiting!!! All I then demanded is that they give me the data that I have paid for but to load it on my phone. Simple I only want what I have paid for. I am now going to try and cancel the debit order through the bank. But what worries me most is that none body phones me to an why I am reversing the payments. So now I must play hard ball !! Bottom line is I want what I am contracted to get as I am keeping to my end of the contract in paying. I hope a Cell C accountant gets this info and that I get a phone call. Not an sms or wapp. ***