Too HOT to drive with no AC!! Help!

Hi my Name is Gabriella Escamilla and I have a 5 year old and my mom 80 that I drive around. And we have No AC in the van. It was working then it stopped. I would hit it and it would come back on. I talked to Benny's Auto repair in Texas city over the phone and he said it should be 400 and that's kinda pushing it. I am asking for 500 Incase it goes over. I just got out of the hospital with some heart issues but my doctor told me my heart is fine

He said it's stress. I told him about my AC he said that's not good that can put stress on you and your mom and your child. Can someone please help us!