Iam very disappointed i have my grandmother and my...

Iam very disappointed i have my grandmother and my mom staying with me and my grandmother has a heart problems and i called last night and told them the air wasn't blowing and it is hot in side the house and we just got a new unit a couple of months ago they said they will send someone out tomorrow between 2 pm and 6 pm when i got home today i called and they told me it would be closer to 7pm iam so mad and hot i wish i would have picked someone else what happened to 24 hour service ?