Please save my grandmother

Hello! I'm currently living in Athens, Greece and I'm a college student. 10 years ago, my grandmother who is in the Philippines fell from the stairs and had to undergo surgery since she broke her bone so they had to insert a metal in her groin. Then last week, my grandmother was rushed in the hospital because she was unable to walk and said her leg was hurting really bad and my aunts noticed that her leg dislocated, so after the x-ray we learned that the metal wasn't in place anymore and she has to undergo another surgery to replace the old metal into a new one. Unfortunately, we found out that my grandma has problems as well with her heart & lungs, so she has to take some medications first and do proper tests before the surgery. She's in the hospital for 4 days now and the bill is already around 30,000pesos which is around 500€. And the doctors said that the surgery will cost about 500,000Pesos, which is around 5,000 euros. And financially they're depending on my mom, since she's an OFW, but my mom is financially unstable because her salary is just enough for everyday living and we can't afford such a big amount. So please help us. My grandma needs your help. Thank you in advance.