Be aware that some people will call on a out of country number that charges X amount of dollars per minute which might be why they place you on an extended hold as soon as you pick up. If you have a smart phone try downloading a call blocker to add these kind of numbers to the list
Call late at night several times a week. What a nuisance. I am letting the phone
ring and not picking up since 302 area code and don't know anyone in DE