Made the annual call today - got $60 off for 12 months but that was it from their loyalty dept. I asked for cancellation dept and he said he could schedule that for me. Serious hardball, so I said I’d take the offer and would call back if I decided to cancel. After that I went the Twitter route as I had success last year that way. Got an additional $15 off per month with no expiration, and another $25 off current bill (since new promotions don’t take affect til next billing cycle). At that point I just flat out asked if she could comp me ST Max....short hold and....Ding Ding!!
For those that haven’t tried this route, direct message @ATTHelp saying you need relief with your bill. They will reply with a chat link. At that point be super polite and ask what they can do for you. Suffice it to say, their social media CSR was much more pleasant than the phone guy I got.
YMMV. Good luck.