That's the most frustrating thing about these p.o.s. callers...they simply call an hour later from a new number, knowing that we probably blocked the last one. I have a limit on how many numbers I can block before my list gets full, then I have to empty it and start again.
Hey, just an FYI, you can "upgrade" to an S5 for almost no cost, being careful about calling an S5 an upgrade, although if you're still sporting an S3 (which is impressive), and S5 will take you a long ways!