My ge French door fridge stopped cooling. My neighbor fixed the fridge

My ge French door fridge stopped cooling. My neighbor fixed the fridge My neighbor fixed the fridge cooling fan but temp won’t go down past 40 degrees. The freezer is good zero degrees however the usual temp is -4/34. Now it’s 0/40. If fridge temp goes up. Point freezer temp goes up a point it’s not working at its full capacity. Fridge is 8 years old. Is it time to buy new fridge. It takes overnight for fridge to cool down to 40 again if I put food in.