Past Due Phone Bill Isn’t being turned off

I have a phone bill that is around 2 years past due. (There were massive wildfires which caused me to be out of work). Ive recently gotten back on the saddle and am back to making the money I need to survive. I was checking all of my finances and noticed a huge (2000$) bill for att. My service hasn’t been turned off and I haven’t received any kind of notification for it. Paying it off will be a challenge but I’m not sure what else I can possibly do. Any suggestions or help would be appreciated.

Edit: it also has not affected my credit score in any way