Premium Membership lost through account merger?!

I came to this site primarily through Facebook Chess, with the username edwardmason1989. With this account, I bought a monthly Diamond Membership. However, I wanted a single proper account with this website, so I merged it with this account, esmason. Maybe that wasn't necessary, but it's what I thought was best at the time.

The downside is that I've now lost my Premium Membership. There was no indication, as I understand it, as to which way the merger would happen, nor that paid memberships could get lost in the exchange - and given that other things, such as game histories and so forth, were transferred, it seemed reasonable to assume that my membership would also.

Is there any way of getting it back?