Problem canceling Xfinity plan

Hi, I recently moved out of the United States and canceled my Xfinity service before leaving. I completed the cancellation in person at an Xfinity store and paid what I was told was the final amount due at the time.

However, I have now noticed another charge from Xfinity on my bank account, and I believe I may have been charged twice for the final balance. I have already submitted a duplicate payment request.

Could you please verify:

1. The effective cancellation date of my service;
2. Whether my account is fully closed and there are no active services;
3. The amount of my final bill and whether the payment I made at the Xfinity store was correctly applied to it; and
4. What the most recent charge to my bank account was for.

If the most recent charge was for an amount that I had already paid at the store, I would like to request a refund of the duplicate charge.

Thank you for your help.