You have to get kitty to a vet, most will work with you on a payment plan...kitty has a head injury, maybe even a fractured skull and will likely die without help.
YUP!!!! Pip is absolutely right. ASAP! Emergency!!! Somehow the payment will work out!!
Kittens have feelings too, all animals do, please, if you care anything about the poor little thing, take her to the vet, she is suffering. Do it NOW!!!!!!!!!