Request for executive relations team

I’m a 5+ year good customer in good standing with both Xfinity internet and mobile.  Xfinity Mobile suggested I “take advantage of” their free line offer in July.  They didn’t explain that the data would be shared.  I just got my bill and it’s $245!  So I called and asked for a credit and to be moved to unlimited plan.  The agent got a $140 credit approved and moved me to unlimited plan with the free line, $40/month.  I asked to speak to a supervisor and they transferred me but said they were taking back their credit.   I’d like to speak to the executive relations team regarding this.  Can you connect me?  I’d like to stay with Xfinity but this is terrible customer service and doesn’t show they value me as a customer.