Many more spam calls since switching to Voipo

[wimax]

Since switching from Suddenlink to Voipo I get many, many more unwanted spam/solicitation calls than before. With Suddenlink I had maybe one or two such calls per month, now I get three or more per week. With the same number and being, of course, on the Do-Not-Call list.

Can somebody explain this? Does this happen to others, too?

I find this kind of disappointing. I know that I can put numbers onto my blacklist and block them. It still means that I am getting harassed at home much more than before.

I also have the impression that not every time I dial *27 after receiving such a call the number in question ends up on my blacklist. When I compare my calling history with my blacklist I find several numbers on my calling history that I know have been spam calls which are not on my blacklist. I'm also wondering what it means to click onto a number in the calling history and then put that number onto the blacklist. I just did this with several numbers and these numbers are not listed under "Call Routing - Incoming". Where if not there would I see such blacklisted numbers?