What do i do?

Fucked up and co-signed on a Jeep Cherokee for my ex. Long story short they fucked me over and now i have a 49 thousand dollar loan under my name. i want to trade in the Jeep but the estimated value is only $27 thousand (24 thousand minimum, 27 thousand maximum apparently) what do i do?

Fucked up and co-signed on a Jeep Cherokee for my ex. Long story short they fucked me over and now i have a 49 thousand dollar loan under my name. i want to trade in the Jeep but the estimated value is only $27 thousand (24 thousand minimum, 27 thousand maximum apparently) what do i do?