Retention offer made in chat then denied – ticket [Edited] and Chat ID [Edited] – is this an FCC issue?

A few days ago an Xfinity agent offered me $46/month for 500 Mbps for 5 years for being a loyal customer (no contract, no rental fees, unlimited data + $10 loyalty credit). No expiration was stated and I have the full chat transcript. I am a Gold member and was previously on the Loyalty Plan ($55 for 400 Mbps). When I tried to accept the offer, multiple agents (including a shift supervisor and escalations agent May, employee 1026) said the plan no longer exists / was “dynamic” and refused to honor it. I was only offered a $15 loyalty discount, which I declined. I now have escalations ticket [Edited: "Personal Information"]. Is this the type of situation where filing an FCC informal complaint is appropriate? Or can the Digital Care Team / loyalty review the original chat offer and apply it?

Thank you.

[Title Edited: "Personal Information - Ticket Numbers"]