I have no idea how they do it but somehow I only get a lot of scam/spam calls from random numbers when I'm expecting something important, like the plumber/decorator etc. or when looking for jobs. I kind of understand the latter (job sites giving out my contact info to 7 billion scammy 3rd parties), but even when my landlord schedules something for the flat, it's a coin flip whether I'll get the next call from the right person.

So yeah, send an email if you want me to actually reply somehow.