Please close my account

I am struggling to close my Edgar's account for months now, I have settled the account and even paid extra so that I don't incur any charges the following month whilst they close the account. However it's like they just don't want to close this ****** dumb account. I keep emailing this Nimble group that has also taken over Edgar's, they just respond with a paid up invoice but the account is still not closed. I don't know what else to do. It's like they thick headed and can't understand what I'm saying. This is so frustrating