This one is not an issue with Guest Relations except that they haven't returned your calls or answered emails. The girl rooming with you took responsibility for accepting the upgrade. When this happens, keeping cabins together is usually not an option. Upgrades are rare and can be declined but if accepted you go to where the upgrade cabin is. I suspect the agent is avoiding the contact because he/she knows you're going to ask a question he/she is going to have to provide the above answer to and is not comfortable with confrontation. Did you, in your correspondence make it sound as though you expected your group to remain together? No excuse for not getting back with you but be kind if he/she does. It was not a forced upgrade and was most likely requested. I'm sure the agent thought he/she was doing something you'd be thrilled with and now doesn't want to face a situation he/she can't resolve.