Billing *****

I have a taken a smart data share contract in May 2017. I used my wifi to connect to DSTV catch up via the cell c router. This contract was taken at R499 pm. My account used to come around R800 pm but I thought that is must be due to over usage. Cell C would email me statements but I was never able to open it, they use infoslips, which I could never logon to. From Dec I got Uncapped Wifi from another service provider, but I still got a high account. I went into a branch to check on the account, they tell me that there is 'content services' charged for every month. This is some thing you normally accept via a link they told me. I am very disturbed at this, because I gave nobody permission to add on a service to my account, downright *****ing/*******. The sim has always been in a router, never used by a cell phone. I have sent a query to cell c today and wait a response to provide a solution. If this gets resolved ie. my money back for those charges. This problem can be closed amicably.