AT&T DSL bypass first line

I've been an AT&T DSL customer for 3+ years, with no issues until they started sending people into my neighborhood to "start retrofitting for UVerse". Since they've visited, my PPPoE has dropped once an hour, many times requiring me to restart my router (Cisco 877) to get my virtual interface to come back up. Speaking with the front line on the phone has given me nothing but problems (in their defense, I do have a non-standard modem) -- could someone with knowledge provide me with a way to bypass the CSRs and speak to someone with clue to work out debug logs and figure out why I am suddenly an unhappy AT&T customer? -- Brandon Ewing (nicotine@warningg.com)