Would you reschedule or forget it?

I recently received a telemarketing call offering a service I actually need (a free estimate on home repair-remodel).

Since it was convenient that they called and saved me the bother of trying to find someone, I scheduled an appointment for one week later and made appropriate arrangements to be home.

Two hours before the scheduled appointment, they called to cancel and asked to reschedule.

I said I'd get back to them but am not too eager to bother.

I was VERY clear about needing a LOT of home repair and remodel, so this would have turned into a very large job.

I've never heard of their company before and after investigating, I see they have a handful of complaints about their telemarketing (not the actual home repair service).

Would you reschedule with them or take this last minute cancellation as a red flag and just find someone else ?