My Time Rewards — Unauthorised payments

I checked an old bank account today and was surprised to see transactions to "My Time Rewards" that I did not recognise totalling £35/month ( £10, £10, £15) when I found a number online and called them it turns out it was from "The Trainline" in June 2016 offering rewards on future train journeys as long as I ticked boxes and was then asked to click on the next screen to claim your £10 discount. I tried this several times but the screen always froze with a message "this page is temporarily unavailable, please try later" At no time had I heard of My Time Rewards and certainly never agreed in any way to them taking money from my account. This is a complete con and needs to be stopped