This is normal behavior for stressed snakes that is in a new home! You need to make them feel secure by cover the sides and top. Even if you just use newspaper! Make sure you have two tight fitting hides with only one small opening. If you have them in a large enclosures(bigger than 15 quart or 10 gallons) then you can add crumpled newspaper for security. No handling or disturbing for one week and then feed. Keep repeating until they eat! Make sure you are feeding them the same as what the previous owner fed them. Do not handle them until they have eaten a few meals! They should start eating in a couple of weeks! They will calm down and spend most of their time in the hides when their stress level goes down! Good luck and be patient!!!