Other providers (one begins with T) are more transparent and ethical with charging - without taking a finance plan, they change to SIM only - ie don’t charge for mobile device after the contract period ends
Are you still using your phone or have you left 3? If you are still using your phone the you will still be charged for using it. If you have left 3 did you tell them? If you left and did not take your number then you need to request a stac code.
This also happened to me and I got a code upon changing. Three continued charging me for the handset two months after contract ending. I have complained and they are undertaking an investigation which will take 30 days. I will never take out another contract with Three.
