You should not barrage them with e-mails. It is counterproductive as then they have to deal with each of those e-mails. My understanding is that they have a large number of e-mails to deal with.
It is much more effective to send one polite, well written, thought out e-mail that contains all the information you think is relevant. Things like the original order number (you can look it up in my orders), date of original order, and anything else you think might matter.
Also, did you check your account settings to see if you have a ticket? Buying another ticket when you already have one is just preventing someone else from being able to attend.