do not call

I put my mobile on the do not call register today.  I got an unknown call a couple of days ago that I missed and didn't bother ringing back, then today it rang, I picked up and missed the call (answer and it hung up).  I thought I might have messed up the answering and found this number had been calling multiple times a day  - ooh maybe its a sessional teacher needing to call me.  I did have one call at work today & he had called last year on my mobile and I'd ignored it as an unknown number.  I'll call back. ...Answering machine with if you are returning a call to "insurance company I will not advertise by naming here" and are interested in ....press 1.  I proceed to hang up as soon as they get to press one. 

I've never contacted these people, so some company that has my mobile has sold the list - bad company.  I did a search on the number and apparently there's a lot of complaints about them multiple calling people who never even contacted them. 

So, my phone won't block them without downloading an app that is allowed to phone out from my mobile and thus spend my money.....what the??  My phone service also does not provide this service.  They recommend getting on the "do not call" list.  So badda bing there I am. I also put them on my contact list labelled SPAM, so if the calls do come through, I will see and ignore them easily.

If do not call doesn't work, my friend, Spam, may end up having a lot of numbers over time.