I recently travelled from Newcastle to Carlisle on the northern railways. I didn’t realise the railcard expired until it was checked and immediately bought a new one. The previous one expired on 29th of June 2025 and the date I travelled was 8th of July 2025. I received a letter asking for the explanation and have replied back apologsing. I am going to change my address as moving for a new job and have included in the email to keep me updated with further correspondence through email. However I am a little scared now as to what expect if they reject the appeal considering the wording of the letter and also afraid I might miss out on any further communication. What do I do?