I have Lumia 540 Dual Sim which runs Windows 8.1 update 2 Lumia Denim (software is up to date) and I can't find the Call+Sms Filter on my settings. I really want to get rid of annoying messages and calls. I've tried going to call history and long pressed the number(s) I wish to block but the there's no "block" in the options. I badly need help! Thanks!