Help needed to fund Benji’s operation and rising bills

Hi, Benji is my 7 year old rescue dog, we have has him for 6 years. 2 years ago he was diagnosed with cushings disease and dispite being on a very high dose of medication which he needs to take for life the illness is not responding to it. On 30th december 2024 he became very ill and was rushed to the vet who diagnosed stomach infection after blood test and ultrasound so sent him home with painkillers. However by 1st January he was worse so we took him back and after scans and tests he has been diagnosed with severe pancreatitis which is caused by his cushings disease and vet advised he was so ill we could lose him. Benji is still in the hospital being fed by a tube through his nose as he will not eat, he has had catheters inserted in his back to deliver medication to numb the pain in his abdomen and up to today / 6 th Jan he although he was improving slightly he is deteriorated today so has to stay in hospital. I do have Benji insured as I am a responsible owner but his policy renewed on 24 th december with £10,000 of cover for the year and so far the Vet bill has reached £6200 not included tonight or any ongoing treatment . Reason i need funds is the Vet has advised that Benji needs an operation to remove a tumour on his pituitary gland /which is on the base of his brain as this is causing the cushings and once he has this he will not get any more of the cushings symptoms, he needs this as soon as he is strong enough and the estimate for this is £10,000 so I will not have enough left from the insurance to pay for it, i am try to raise £5000 towards it as i can get the rest together myself, please help if you can as I do not want to lose him, he has been through so much. Thank you..