if you want to sell your shares then you just need to contact your broker. I wouldnt be waiting for a call as they will only quiz you why you have not sold and then direct you to your broker. Not sure if they are still cold calling as pretty much pointless at this stage.
Regarding lack of information being put out, be prepared for this to get worse as MIN do not announce much of what is going on, they issue information (because they have to) through quarterly reports etc.
NWE Price at posting:
5.8¢ Sentiment: Buy Disclosure: Held