Unhappy Cell c customer

I've been trying for the bulk of the year to either have my Cell C mobile WiFi router fixed or contract cancelled. Neither has been done. My router has been sent for repairs but now cannot be located. Meaning I have been paying and I am still paying for something I have not been using for months. All I'm being told is that they cannot do anything about it. This is infuriating and unfair. Cell c employees have non chalant attitudes and the company is a bunch of ******* *****ing money from hard working people