Stop Debit Order and Reverse Funds Immediately

I have been waiting for more than 3 months for a debit order to be stopped and a reversal to be done.<br> I ordered a device in November but once it was delivered realized that it was not what i wanted, i requested a collectioncancellation on the same day the device was collected 2 to 3 weeks later.<br> <br> Now there is no record of the device. I am being held liable for a device that i do not have.<br> <br> This is day light *******.<br> <br> Please help.