Deducting money for item i do not have

I went through my bank statement and saw Vodacom is deducting more than I signed up for.<br> <br> I called customer care and came to conclusion that this is due to a wifi ****le I was offered in August 2014.<br> <br> The deal reference nr is ***7. I decided within the allowed time to return the wifi ****le as I was informed we already have wifi in home and it will be a waste.<br> <br> The courier service came and collected parcel but it seems this deal was never cancelled as my bill reflects and customer care confirms 2 lines.<br> <br> please can you look into this for me as I am being billed and paying a few months now for something that I cancelled at customer care and don't have in my possession.<br> <br> I would like to be refunded as your records will show I did cancel from my side and the problem is by your side.<br> <br> thanks