Help my baby out

My baby “Precious” is 5 year old. Last night she woke up and had severe pain on her back left foot. She was crying out loud and I rushed her to Mt Albert After Hours Vet Clinic. They kept Precious overnight to do a X-Ray and found that she has Patella Luxating. Which means her knee cap came out of place and she needs to undergo an urgent surgery because this condition can get worse over time. I have to pay them upto $1800 in cost and surgery costs can be from $800 to $6000 as per the google search. I have not got a final bill from them yet. But, fingers crossed its at the lower end.I’m really struggling to pay these costs but my baby needs her operation as soon as possible. Please help… I’m desperate.