We need a lot more details to be able to help, and pictures of the tank and coral would be helpful too.
Is this a new coral or one you’ve had for a while?
Do you have other SPS? How are they doing?
What are your water parameters? Particularly salinity, ammonia, alkalinity, calcium, and temperature.
How big is the tank and what type of lights do you have?
It’s worth noting that things like moving the coral around, doing water changes, and changing the lighting will irritate the coral a bit and can cause it not to open for a while, so if you are continuing to do these things you may be delaying it’s opening. It might just need some time before it opens. How long have you given it between all of the things that you tried?