Plesk5: Unsuspend subscription

[xammy]

Dear Admin,

recently i over limit my disk space quota due to backup script, then the subscription is suspended, and my site goes offline.
and in Plesk5 panel, under the suspended subscription, I can do anything with it.
sorry to ask, but I can't find a way to unsuspend this subscription. what should I do?
I already delete the files, and lower the disk usage below quota.

one other thing, I'm thinking of upgrading my account, are there any option other than those 3 plan?

Thx,

server: plesk5.lvcs.net
user: xammy (68817)
subscription: sammy.web.id