Help Deja live a longer life

Hi my name is Courtney. I am asking for your help for my poor kitty Deja. She has open pyometra. I had no clue this was a thing with cats and dogs but it is very real and very scary. She has seen the vet and has had her surgery priced out at $1200 plus tax.(so donations being asked for include the costs for using GoFundMe) We were able to get an antibiotic shot that will keep her alive and fighting for a couple weeks at most, if she is left untreated the condition will progress and she will pass. The antibiotics cannot cure her condition sadly. My family is struggling pretty hard at this time and this makes me feel like I've failed her for not being able to afford this for her. Shes 9 years old and has been in my life since she was 8 weeks old. I want her to live to see many more birthdays and years with us. She's been such a great emotional support to me for these past 9(almost 10) years and I cannot stand the thought that i could lose her because no vets will work with me on a payment plan and any of the pet insurance I've found wont approve me for help because she is sick. Please if you can help me and my daughter not lose our little furry family member this Christmas we would be forever grateful and theres not words that would ever express being able to have my fur baby survive this and be alive for the new year and many more to come!