Yes sir, something can be done. You can stop answering these calls. You may still get calls, but your level of aggravation will go down when you stop interacting with them. Good luck.
Would you please share the name of the call blocker that you purchased on Ebay for $59? It sounds like something that I need to look into. Do you know what kind of message that the callers hear, or what they receive when they call your number?
Panasonic cordless phones such as KX-TG684?B work great; have Call Block feature which can save up to 250 unwanted numbers. Compare various telepones to suit your needs at http://shop.panasonic.com/shop/phones-and-home-office-telephones. Some of the phones offer only 30 numbers.. (?=1,2,3,4,5,6)