Will you help save baby Izzy?

Hi I am Izzy, I am a two year old pup with active heartworm who was rescued from Tennessee, but my rescuers have not treated me for heartworm. This really nice lady, Mel, brought me home to foster me, and it looks like the rescue has completely given me up as they have gone radio silent. My new friend Mel has no way to pay for the full year of heartworm treatment and the spay which was promised to be covered by the rescue. I really like Mel and her 3 other pets and I don’t want to give them heartworm. Please don’t let me die, my former rescuers have left me untreated for 6 months now and I am running out of time. Please help if you are able. Thank you in advance.