Whereas they wouldn't leave me alone before I signed, now--- I can get no one on the phone, and am required to use a text line.

Does AHP have an investor portal or just email/phone for fund subscriber communications?

Fridge door seal is cracked in several areas needing replacement.

If that person were to get hurt somehow and then expect you to pay the medical bills or become disgruntled in some way it is just a phone call to DOR, OSHA or L&I. 

Over the phone (because I was on vacation), I called him and told him he needed to return everything or I would file grand larceny charges.  

When I drive for dollars, I just take notes of the addresses in my phone and add them to my propstream lists later.As for cash buyers, I don't think there's such thing as too many buyers on your buyers list, although you do only need one to close a deal.

Then they stopped answering the phone it’s been four months.

You also need to change all contact information to you - all email, phone, address. 

Report it to the credit bureau as a loss - and they won't be driving a new car, getting a new phone, renting/buying home until they settle with you. 

A phone call is far superior.