HARD CAP on RAIN network with zero support or communication

Every so often I find my SIM is denied access to the RAIN network. This happens on months when I have been very reliant on it. Look like 4G unlimited is not unlimited. In winbox I can literally see the available band I normally connect to but status shows denied. Trying to get any support at all (telephonic, app, web, email) fails on deaf ears and zero communication is how I've been treated