I don’t know what to do.

I have two chinchillas, but I think I have to re-home one. When I got the chinchillas, the previous owner said they were both males. Though even after it had been a year, he still said they were both males even when I had figured out they were female/male. The male is now riding the female and I don’t know what to do. I only have one cage and I don’t have enough money for another one. Any ideas? I feel like re-homing is the only option for me.