This is the biggest trap. You’re flustered, so you tap your card to buy a fresh ticket for the next train. Stop. You already paid for a journey. If the train was cancelled by the operator (not a strike), you are entitled to a full refund or an alternative.
Think of it like ordering a pizza that never arrives. You wouldn’t order a second pizza and pay for it—you’d demand the first one be delivered or refunded. Same with trains. Your money is safe.