Billing Error Ticket Update

Hello, my Xfinity account switched from a $55 plan to a $100+ plan after my first two years of service. I called to switch to a lower-cost plan and was billed incorrectly multiple times (at the higher rate with no credit applied). I called in again and got reinstated with the $55 plan and the rep backdated the plan so that I wouldn't owe more again. When the rep sent over the new agreement, there was a glitch that showed the bill was going to be around $85 instead of $55, which may have be why I was overcharged after the first call. The rep very kindly pivoted to a recorded agreement to make sure the $55 plan was the one I'm signed up for and filed tickets regarding the discrepancy in amounts and to make sure my overpayments would appear as credits. My first bill after this had credits applied. I tried to call in today for an update on the tickets status but the number wasn't connecting. I tried the Xfinity chatbot but it wasn't getting anywhere, so now I'm leaving a note here. May I have an update on the tickets filed on my behalf and confirmation that I am now being charged $55 a month as agreed and that the overpayments will continue to show up as credits until the $100+ I've overpaid breaks even?