I notice more & more little check boxes, pre-checked, for options that are added to purchase screens. They always seem to be well hidden pages down in the screen. Sending you junk email is ALWAYS there. Perhaps this is how they "got" you. Sorry for your trouble.
I also notice that during a purchase you may select several options for the product, only to be informed on the purchase confirmation screen that options selected are not guaranteed & may be substituted. Outrageous!
It's getting to the point that we may need to change our email address & credit cards every 6-12 months to keep these crooks & nuisances at bay.
Yea, I’m thinking going foreward that all web purchases should be done with the CC that offer 1 time CC numbers, eliminating the possibility of this type of crap. I know ATT universal used to, may still but they are citi now.