You may underestimate how much of shit companies care. T-Mobile Netherlands have been sending me plenty of private information about one of their customers for months (their customer signed up using a.person@gmail.com as their email address, I've held the aperson@gmail.com account since 2006, hence I receive the emails).
I've tried escalating this with them multiple times, each time they insist that I won't receive any more emails, until the next one arrives. I also tried threatening them with taking it up with whichever authority is relevant if they don't fix it and reminded them about the 20m Euro or 4% of global turnover fine they could incur, yet still keep receiving this poor saps information.