If you had them calling you everyday, you'd surely want to block the calls instead of calling them back and requesting them to stop calling. (I realize emails are less intrusive.)

And I don't care much for the company, I just want to use their services. I don't want their email barrage flooding my inbox. I shouldn't have to put up with it just because I'm an 'adult'. Spam is pretty much anything in my inbox that I didn't expect and don't want.