Help Olly the whippet remove a sarcoma

I'm Olly, a 7-year-old whippet from London. I've been diagnosed with a sarcoma in my neck, and I urgently need surgery next week. MEDIVET and London Vet Specialists have confirmed the diagnosis, and I'm scheduled for a scan and surgery. However, we don't know yet if it has spread. The good news is that I have lifetime coverage with Petplan insurance, but there's a shortfall of £3000 due to a limit of £4000 per year. Your help can make a huge difference in getting the treatment I need. Thank you so much I appreciate your support!