Difficulties CANCELLING MY MONTH TO MONTH INSTORE AND ONLINE

I have been trying to cancel my month to month contract for almost TWO months now! Since the end of February with NO LUCK! When i took it out for my mom to use i was told that I will just need to go instore and give a 1 month notice of the cancellation the return the router. I went into store before end of February and I was told that "things have changed" and I need to cancel via customer service 083135. We tried right there to call because I had told them that I always struggle getting through to the contracts department. Anyways, we tried that day but as I had suspected we didn't get through. I left the store and said that I will try at home. I did so but again no luck so I went there knowing that I have enough time on my hands. When I got to the store at Oakfield Benoni, we tried calling using my phone. Eventually we got through, ..The consultants at the store spoke to them and they were told that they DO NOT DO CANCELLATIONS , Customers were to go instore...Im now at the store listening to this contradicting information in the same company. I was then shown an email and the consultants tried to explain this to customer service but they couldn't win. I was then asked to leave my ID Copy so that they can follow up. On the 6th of April I was told that I need to go through customer service, I mean what the hell? how? yet they failed as they store to do that!!!Iv been trying to call customer service and its the back and forth. I am now stuck with the router I was told I could cancel at any time and No1 can assist me!!!this is so annoying I really don't know what to do! Can someone who has better knowledge please contact me so that I can cancel and return the router!