Help! My Promotional Discount is now $5 lower than what I signed up for.

Hello, I have been on live chat for the past 2 hours with customer service and they couldn't help and recommended I come here.

I originally signed up on 6/18 for Xfinity service Connect More, normally $76 on a promotional discount for $35. You can see on my first statement, I was being charged that amount, with $36 in promotional discount and $5 in autopay discount.

The second statement I got, my promotional discount is now $31 instead of $36. It also notes a change on 7/20, and partial charges from there. It states my plan was removed and a new plan added (the same plan) with the new plan being $5 higher.

On 7/20, I did go into an Xfinity branch since I did not receive a Gateway to actually set up the wifi. I was told there I had to sign for it, but no changes were being made to my plan (which is I guess not true, since it states my plan was removed and re-added at a $5 higher price point).

I don't understand why the store would change my plan when they told me there was no plan change. I just want my promotional discount to be back to the original one I signed up for, and customer service via live chat was no help so I come here asking for assistance! Thank you.