upgraded phones with premium unlimited early upgrade and now being charged full price

On September 10 I chatted with an xfinity agent about trading in 2 Samsung A36 5G phones, using the early upgrade on my xfinity premium unlimited mobile plan.
We discussed upgrading both phones to Samsung S26FE phones and mailing in the A36 phones.
I mailed the phones in and assurance received them and credited my account.
The agent advised me that my new plan would be $80 + $6.94 for each phone (total of $13.88) +tax.
Here are the charges from that conversation.
Estimated cost for this line
Device payment
$19.44/mo
Trade-in
-$12.5/mo
Estimated trade-in offer: $450
Promo device credit: $12.5/mo for 36 months
Shipping
$0.00
Total
Original Price$19.44/mo
Current Price$6.94/mo
+ $0.00 down
Now I am being told that the charges are not what the agent told me but rather it is going to cost me $19.44 for each phone each month.
Did that previous agent give me incorrect information?
I cannot see the chat transcription from that conversation on 9/10, but i am told agents can. 
Can you advise what is going on?