Funding for Ankle Replacement Operation

I am seeking funds to undergo an ankle replacement operation for my left ankle. An injury during army days in 2002 has left my left ankle to degenerate and swell since 2012 to the extend that i cannot walk at times. The swelling has gotten more consistent and frequent since 2016. I am seeking funds to undergo a full ankle replacement surgery as suggested by the doctors. Being a single parent and with such a medical problem, my mobility has been affected severly. There has been days when i cannot even get out of bed let alone walk to the toilet.