Charging for a devise I dont have

Hi - I accepted a contract from Mondo which I cancelled within the 7 days Ref 54555 (Bavisha assisted me) as it didn't work however I see that I have been charged for this devise.<br> The number linked is ***<br> This was cancelled on 19 March 2015.<br> <br> It would seem that even though the devise has not been used for months nor is it even in my possession I am still being charged for it. <br> <br> At the same time somehow my email statements have stopped. <br> <br> I have been a good client of Vodacom for years. Recently your service is unacceptable and I have actually changed service providers because of it. <br> I was told cancellation of this devise would be simple however I have had confirmation that moving my business is the right thing to do.<br> <br> I wish I had never agreed to this devise in the first place because it has been an absolute nightmare.<br> I have done what I was supposed to do but between Mondo and Vodacom there is clearly no communication. Getting the devise collected was also a nightmare.<br> <br> Can someone sort this out now please??????