Contract cancellation

I am very frustrated with your service, I have been requesting to have my LTE month to month contract cancelled for the past 3 weeks and it's been a hell of a ride. When I took it up online I was advised that I can take the router to any store and get the ref number to have the contract cancelled but I have been to 3 stores already and I was told that they can't book it in because I bought it online. ( Mall of the South, Newtown Junction and Maponya mall)

Please cancel my contract before I get billed again for services I am not even using. I don't want this contract anymore and it's unfair that I'm being sent from pillar to post but when I took it up it was so easy and the router was delivered to me but now i must go to different stores and still not get assisted. My contact number *** Prudence Kele