@SpeakUp I have, again, fixed the images you posted above.
Procedurally speaking the position is crystal clear: you must respond to the tribunal by 14 June (by email, you cannot risk any postal issues) or else the tribunal will simply issue a direction to pay and you will lose the right to appeal.
At this point your options are to respond yourself based on the documentation you already have, or follow the instructions in my PM and let me sort this out for you.
If you are going to do it yourself, I suggest you post a draft on here in the first instance.
Whatever route you go down, as H C Andersen points out,
you must respond or else you will be ordered to pay and that will be the end of the matter, which would be hugely unfair but there would be no coming back from that.