If you are a soldier with an appointment to USMA, or any service academy for that matter, and are facing obstacles from your COC please be proactive. I’m assuming with the following that you have no UCMJ or other major issues.
First, obviously use your COC to include open door policies of the officers up through the state AG if necessary if you are in the National Guard.
Next you can contact USMA to see if they can help.
Finally, contact your congressperson/senator, even if you don’t have a congressional nomination.
I personally know of two cases where superiors thought they could mess with a service member with a SA appointment. In both cases the SA took action through the COC and to say a crap storm rained down would be an understatement. In one case when the sailor did not show up on I-Day they contacted the sailor. When the sailor responded that the COC would not let them leave it was fixed immediately. They were late, but they got to attend the SA.
In the other case a soldier was not being permitted to out process and contacted USMA for help a week prior to R-Day. Suddenly an E-8 appeared in the soldier’s barracks to personally escort the soldier and in one day they outprocessed.