got TPMS reset, have a question

[QueBert]

I Googled this but I don't know what the hell exactly to ask. Got new tires and one of my sensors was bad so I bought a new one. This was Saturday, they reset whatever they needed to so the SRV TMPS message would go away. 3 days later it's still on, I went back to America's Tires and he told me he think's I need to drive it for about half an hour at speeds of 25mph or above. It's not that I don't believe him, but I don't have anywhere to go. So a 1 hour trip to maybe fix something doesn't sound great to me. What I'm seeing online is the after being reflashed the sensors should kick back in and work after a few hours of driving. I didn't see anything on Googles about 30 straight minutes of freeway driving.

This is a 2007 Saturn Sky Redline and they reset it with their machine, not the way a person can do it themselves that's in the manual.