So again just to clarify I am asking if any of those tickets you bought had any sort of discount on them, you keep saying you paid correct amount and full amount, that's not quite answering what I'm asking, just to absolutely clarify no tickets had any sort of discount on them that you were entitled to at all?
And also you have no refunded tickets at all on trainline?
Nope no discount on any sort of ticket before august 25th ( which is the day after I bought my railcard ) I can show this with the emails, when I had added a railcard they state 'dont forget your railcard' whereas those tickets without railcard made no mention.

& just to clarify any ticket before railcard purchase did NOT have any sort of railcard or any other sort of discount.
Additionally, I had refunded 3 tickets, however I can account for this with evidence I did not make my intended travel, I had attached this evidence in my email to them
Just a point here, you admit that you avoided one fare to save money, and two posts up you say that you are a law student. I’d suggest those two facts don’t sit comfortably, and that you should do everything possible to avoid prosecution if you have any intention of pursuing a career in the legal profession.
Yes I am aware, I am aware I done a
very stupid action, however the fact they are charging £1,000 upwards is absurd, this is based on the fact they
assume I have avoided 15 other correct fares
If they don’t know you have a railcard could they be looking at 15 journeys made in September and October?
I only made 8 journeys in September - October , all journeys I carried my railcard with me because it was on my phone and I do recall having inspectors on nearly all journeys.
I think you need to check your records very carefully. If they say they have evidence you have fare dodged on 15 occasions, then they will have the evidence. That can only be that they think you were donutting or the tickets your purchased were with a discount and they do not have a record of a valid Railcard. If all the tickets on your account were full fare through journeys (no donutting) then they wouldn't have the evidence to suggest you have 15 violations. So you do need to check very carefully.
Is there any way someone else has bought tickets on your account or you have bought them for others?
Nope, I've only ever bought tickets for my ex-partner, who I had sent the tickets to, but this was on 2 occasions in November, we did have inspectors on our train and everything went fine.
I am 100% positive I've paid the correct adult fare, otherwise I wouldn't even think about taking this so far.