Condo board is ignoring email requests and communications

Our condo board president asked unit owners not to send e-mails. In every memo the board sent, they asked us to contact via e-mail, phone or postal mail. I have sent many e-mails asking for some clarifications/answers etc.. They did not answer any of my e-mails. Now the president is asking not to send e-mails, just call him on the phone. I feel they can say anything on the phone including lies, false promises, threats etc.. They are afraid to answer my e-mails. How can I complain this to concerned government authorities or sue the board for ignoring my requests?