large terrapins needing homes

I have 3 terrapins in need of homes. i didn't mean to take them. I was appoached a couple of weeks ago regarding these animals, and a member of staff said he would take them.... so I agreed to accept them. NOW my staff member says he can't cope with them, and he is handing them back to me. I DONT WANT THEM!!!!!!!!
I am having to buy housing for them, filteration, lighting, food..... etc, but wouldn't have taken them in the first place if My staff member had said no.
2 are approx 12 inches shell-length. One is a red eaded slider, and the other is a yellow-eared slider. sex unknown but approx 9 yrs old.
The other is a bit younger (i think) at about 6 inches, and I think is a tropical slider.
Can anyone (anywhere!!!) help?
Jan