We all get them at same time the people that will not stop calling you, in my case CC company

missed a payment by a week and they started. First of all I answered but refused to confirm any details, now that gets right up their nose.
BTW you are not legally obliged to give any information over the phone to anyone that calls you. Said I would call them back. Less than 24 hours later they started.
It is now nearly every hour using 3 different numbers. So how do I stop them pestering me and annoying me. Your phone company will not block them if it involves owing anything.
First of all record a few seconds of silence on your computer and then transfer it to your phone. Then all you need to do is associate the numbers to that particular sound. SIMPLES

Result - i get some sleep
Turn your phone off you say, unfortunately I can't my boss needs 24/7 contact