Pepsi shot eye

My cat was shot in his eye. I took him straight to a vet. The bill is £285. I have no money but saved his life. He was a feral kitten dumped in my yard but wanted to give him a chance of a happy ,fulfilled life in our home. I opted for surgery rather than him be put to sleep. He is such a loving boy but when the vet bill came in,I struggled to pay it. Please help. Thanks.