Overheating

II took my car to get flushed two weeks later it started to get hot and I needed to put water in the radiator every two days or so. Then all of a sudden, my air conditioner stopped working and steam started to come up on my window and the water started to shoot out from the bottom so apartment at the house the water just started coming out from the radiator. I took it back to the place like a week later, but I didn't drive it until they told me to bring it in. They said they fixed it, but driving it back still got hot and overheated, I can't afford a mechanic and I'm praying it's not my motor because it's not knocking it's been parked. What do you think it is? Maybe it's my coolant? Maybe it's my coolant temperature? Maybe it needs a radiator, and maybe a water pump or maybe a hoses? Should I just replace all those? Need help please. I can try and do it on my own by looking at some videos. I really need my car fixed to get around.