Email spamming is getting out of control

So yesterday I was looking at Eye Buy Direct’s website, looking at frames. I decided I was going to write them an email regarding a question. But decided against it, and cancelled the email. I did input my info, but disregarded the email altogether, so nothing was sent. Literally 3 hrs later, they started sending me email newsletters! I unsubscribed, but again today, literally 3 minutes apart they sent me another two emails! This is horrible! 🥲💀