If your account is disabled, what to do depends on why:
If it was disabled even though you just paid, tell support and they'll check the payment and reactivate it — this is usually a quick fix on their side once the payment is confirmed.
If instead you're asking to "enable" an account you've paused or that's between plans so you can do some work, that's handled as temporary access: support can grant it for a few hours, but as a rule only once, and once that temporary window is disabled it can't be re-enabled again.
So if you request temporary access, make sure to do everything you need within that window.