I recently purchased train tickets through Trainline and accidentally selected the wrong travel month (September instead of December). I realized the mistake within 15 minutes and immediately contacted their customer service to correct the dates. Unfortunately, they refused to make any changes or offer a solution, even though the request was made almost instantly after booking. This shows a complete lack of flexibility and customer care. Mistakes can happen, and I expected at least the option to change or pay a fee to correct the ticket. Instead, I was told that nothing could be done. I am very disappointed with this experience. Trainline acts only as a reseller but takes no responsibility in assisting customers when issues arise. I strongly recommend double-checking every detail before booking, as even the smallest mistake cannot be fixed.