I also purchased series E convertible stock and your certificate clearly shows the par value - it cannot be changed on what you own. Also remember, series e are non-dilutive - they convert at a rate of 100,000 commons per each share of preferred series e. 1,000 preferred E shares get you 100m common shares.
There is a waiting period of one year - is your year up yet? If so, send in your shares and collect your commons - should only be a 2 week period to complete.