Getting another phone number will not stop the calls.  These callers already have every p[hone number that can be had. All they have to do is put the numbers 0 through 9 together in the right combination (and the computers can be made to do this very well) and sooner or later you will be getting calls again:   such as:  323-870-1700, 1701, 1702, 1703, 1704, 1705 and so on.