[Plankton]

Blocked all their numbers but they're now sending four letters at a time!

[Shrek]

How about not blocking them but ringing them and asking for your details to be taken off their system?
Blocking a phone number isnt going to stop them sending you letters 

[The Jester of Wibbly]

Enjoy your console game 

[Plankton]

It's addictive! I was sneaking in a few battles to many this morning and now chasing my tail to get the work done.

[Plankton]

How about not blocking them but ringing them and asking for your details to be taken off their system?
Blocking a phone number isnt going to stop them sending you letters 

I've told them before I'm not interested and they'll say oh sorry I'll take you off the system. There's no chance I'm taking any numbers of the blacklist and phoning them is only a chance for them to try and sell me advertising.