This is what has worked well for us. Tell them that you are doing fine and if you need their assistance YOU have their contact info and will get in touch with them. In other words, don't call us, we'll call you. You may have to do this several times and even get firm with them. Keep repeating this. It is kind of like a cat and dead mouse game. If the cat has nothing to toy with, eventually it will loose interest.
Don't answer their texts, phone calls or the door. They will get the point eventually. As soon as you start talking, they WILL come after you. Slow, steady and quiet is the key. If you decide one day that you want to spill all and don't care about the end result, go for it and let em have it. lol