Can you update any of that personal info and give them fakefake slightly altered but still valid values? Like, give them a fakevery nearby zip code (preferably 9-number) zip code that is near your zip code and the mailman could still figure out to deliver you mail. Or "you spelled my last name wrong, it's DasBeesto not DasBeasto"
Can you change your username to something highly random?
Make sure you use a long, unique password for that site, that has absolutely no relationship with the passwords you use on other sites (not rAnD0m-sitex
for example)