Bottom line is Eli belongs with you. However, it seems this group really wants to give you a hard time. I don't know if they would want to pursue legal action or not, but if they want, it could cost you a lot more then $120.

I would see someone face to face, show them the bills, and see if you can reach an agreeable adoption fee, or just let you keep him, based on your investment. If not, I hate to say it, but you may have to pay the $120. I know it stinks and it isn't fair, but Eli's hapiness is what is most important...and that is worth way more then $120!!

I hope it works out for you, without having to pay the money.