Warning. This is a scam.
When you see an item on your bank statement for around Â£60, ring your bank immediately and explain that you cancelled the so called free promotion before the transaction date of the item and they will then issue a refund. You will then have to cancel your bank card as this will then stop future bogus transactions from being taken from your bank account. You do not need to prove to the bank that you cancelled this item. They take your word for it.
It might be a white lie but you will receive your money back. Good luck