If you don't receive the M-***** code for some reason or you're not able to input it within a given timeframe of 5 minutes - your payment is automatically canceled in 1 hour from order creation and your bank releases funds back to your card. This process might take from 1-2 hours up to 3 business days (weekends not included) due to your bank's terms and policy.
To speed up the process of unblocking your funds, please contact your bank's customer support and ask them to release your funds back to your bank card.