WellnessWatchersMD Charged my account without my permission or knowledge Internet

This is now the third time, yes THIRD time, over the past few years that I have gotten a charge in my bank account from wellnesswatchers. I'd never heard of them yet somehow they got my email AND my banking information, enough to charge my account. I wish I knew how they get this info. One time the guy said I agreed to their service when signing up for another health related item, but I hadn't signed up for anything, and still haven't. Thankfully they have always canceled my bogus account and refunded my money. It's the weekend, but I'm guessing when I call tomorrow they'll do that again. It's just really annoying to deal with this and concerning not knowing how they got my info.