I need an xfinity employee to look over goodwill credit/refund fraud that was done to me by the company

I was promised a goodwill credit for a customer service agent who promised me something and lied about it.. Also multiple reps have also lied about the goodwill credit and keep telling me one thing and it dosent happen. .and I am also told to get follow up phone calls the next day and it never happens. There's a lot I need to discuss and I have the screenshots and transcripts available to prove my case. I would highly appreciate that someone please respond to me so I can figure out if its even worth staying with xfinity or not bc right now I really feel scammed. Thank you