Please Help we are melting :(

We are in need of help! Our AC is very old and needs replacing but Nana only get a very little income ever month and so that is not possible.
It is sooo hot in the house and bills so high we can not have the AC running. 
Nana had to use the house payment just to keep electricity on. Now a even higher bill. We may loose our home. :(
Please. Please help if you can.  I am scared and sad.  If you have a fan or two...that would help too.
Thank you!