I am sorry to hear you are having trouble with your cats at night. My name is Rebecca. I am a veterinarian and will do my best to help.
This is not an unusual problem, since cats are nocturnal by nature. I would not separate them, as that might start them being active again, trying to get to each other and vocalizing because they are apart.
5 days sounds like too short a time for a real behavior change. It sounds like things are getting better, but you do not want to let them in too soon. If I were you and these were my cats, I would probably wait 7 to 10 days, to be sure they were being quiet at night, and then try opening the door. At the first sign of them keeping you up, out they go and the door closes again for a few more days. They must learn that waking you does not get them what they want (food, attention from you).
Even your talking to them is attention, so be silent, do not respond to them at all.
It really sounds like they are learning and you are doing a great job. Just be a little patient a little longer.
Let me know if I can help with or answer anything else. Kindly consider rating my answer (always appreciated!); you can still get back to me with questions and updates after rating. Rebecca