Mortgage company always at our house?

It sounds like a bunch of harment and stalking to me. It's none of their business, even if you own them money what ages your children are and who is living there. You aren't renting the place. Tell them they can come at decent times of the day and see if you can schedule the day if they really MUST survey this place, although I can't imagine why the heck they are doing that in the first place. Can you get an order to keep them away and/or change mortgage companies?