I get tons of calls a week from these type of numbers every week. The best thing you can do is to report them every time they call and not answer their calls. It keeps your number in their system if you don't answer and never do they lose interest.
Called and hung up after I answered it. When I called back, they say to stay on line for a representative, and then nobody came on and in about 5 seconds it ended my call
They have called my number and my husbands number several times over the past few days but they will not leave a message. Tried to call back - either no answer or it tells you to hold for a rep - that never answers!