Get a cell phone for personal calls and give that number out to those you want to talk to. Then use call forwarding to forward all other calls to the phone number they gave you. Just think how much fun that would be!
A friend who had had a similar problem getting calls from people who thought they were calling a dog grooming shop, she suggested to me to use the tactic she had successfully used.....tell the caller that the shop had gone out of business. LOL