Go to Top-up -> Over-the-counter -> MLhuillier
Input your desired top-up amount, your debit card details and perform the required authorization.
Once you see a success screen, you will get a cash-in code. The cash-in code will be active for the next 1 hour after creation.
You have to perform the cash deposit at your preferred MLhuillier store within 1 hour.
Once a deposit is done, the money will be added to your account.