Can someone help with my baby kangaroo (joey)?

A couple days ago i adopted a baby kangaroo. I read some tips that said to put it in a pouch. i did but it leaked like crazy. I don't know why. Some site said that joeys don't go pee or poop in the mothers pouch. That was not the case. The bad thing i used is destroyed there is pee and poop all over my house. my baby kangaroo won't stop going on everything. There is pee and poop on my table, bed, counter, sofa, FLOOR, carpet, it can just keeps pottying. I tried to find some method of potty training it but it all failed. It wont keep ANY diapers on. I need help