Mobile contact up but still being charged for device

[Rumple23]

My contract expired last month and my credit statement states that last month should have been my final payment but I have been charged again today. 
Why is this and how do I cancel? 

[Alex_RM]

Hi Rumple23,

Thanks for posting and sorry there's some confusion regarding your mobile bill.

This isn't something we can check from here, but you can call the team on 0345 602 4420 and they'' be able to advise. 

Alex_Rm