Lots of comments re don't use a debit card. I have 2 cards, one main one, on the main a/c, that doesn't get used for any online or physical in-shop purchases, only a couple of direct debits.
I have a secondary a/c, that one with its card does get used for any online etc purchases, BUT I only transfer in enough funds from the main a/c for those purposes.
Someone else mentioned Spam emails -- you SHOULD try and remember to check that folder every couple of days. The software to filter out those 'spam' emails is extremely fallible, bordering on abysmal. I've had emails from my sister plonked into Spam, also from the local vicar, all sorts of genuine ones can get selected. Sure, probably 80%+ of Spam emails really ARE Spam, but that leaves quite a few that aren't!
I'm with Virgin Media, (They all have the same issues), and their GENUINE emails have sometimes been selected as Spam. Lots of the spoof emails that come through pretending that my a/c has been compromised do NOT get selected for Spam! Depressing isn't it!