This number keeps calling me and also calls me from various numbers similar to this number. I'm getting tired if then calling me I answer once and no-one answered the phone.
Yes. Keep track of all of their attempt s to call you. I've got their numbers blocked, but my phone keeps a record of them all in it's block log.
It's illegal for them to do this, and if you can track them, and take them to court, each call they made to you is worth money .