It’s not clear from what you have said, but in relation to a vote at the EC, unless it was on the agenda there couldn’t be a vote. It is a bit confusing because you have said you wrote to them, in which case there may have been something on the agenda, but even if there was, it would have had to have been pretty clear, i.e. a resolution to permit you to do what you want to do. The EC cannot vote on something that is not on the agenda. It is up to you to send a resolution to the EC secretary for inclusion on the agenda. If you did that and it wasn’t included in the agenda, that is a separate issue.
Setting that aside I am not sure that the EC would have the power to resolve to grant you that permission, because effectively you are asking to be granted exclusive use of a part of the common property, and that is a matter for the OC to consider at a general meeting.