In most cases, if you have just paid your invoice and your account had been disabled, it may just be a matter of waiting a short time for your payment to be verified and our technicians notified to re-enable your account. Our billing offices are only open during weekdays, but we have remote staff who check in as much as possible outside of those times to ensure youre not offline longer than necessary.
If you have your domain registered with us as well, you may wish to check to be sure it hasnt expired. Click "Manage domains" in myCP (http://mycp.nanoservers.net/) to check on your domain status and renew as necessary.
In the event that you are still having problems, please open a support ticket in myCP and if possible provide as much detail as possible regarding your payment, and our staff will investigate as soon as possible.