Getting billed after cancellation (multiple cancellations)

I have cancelled my services on 3/30/26, received a cancellation order number, was promised prorated credit to be mailed via check.

However, I saw my credit card get charged on 4/25/26 with the regular monthly amount.

I called again on 4/26/26 and understood there were technical issues with the first cancellation, was given a new cancellation order number.

Today, I see the May bill coming through with recurring monthly charges...

Could someone let me know who in Xfinity knows how to fix this?

I just don't have the time to wait on line and repeat these again.

Thank you,