Can't update my ticket - no submit button

Any PlusNet guys out there that can help with this?

Ticket number is: 20049883

This ticket is currently "Awaiting your response" but I don't have the usual Submit Your Update button to add any more information to the ticket. The ticket is still Open and the only option I've got is to close it which isn't what I want to do.

The same thing happened the last time the ticket was handed back to me. I called customer support and the agent made an update to the ticket for me, assigned to the relevant department and said they were not sure why I couldn't update myself in this instance but should be ok if it gets sent back again.

I don't fancy spending ages on a phone queue everytime I need to respond. I'm guessing it's something to do with an internal status that I can't see. Can someone sort this out for me so that I can update as appropriate?

Thanks.

server must be so full of tickets they've disabled the update function!