This may be a temporary hold. This is not a charge but a card authorisation by your bank. When you book a trip via the FREENOW app your payment method is authorised to ensure the payment method works/has sufficient funds.
This usually shows up as 'Pending' and can also be displayed as FRN*hold.free-now.com on your online transactions. Although this isn't an actual charge, your available balance would’ve been temporarily reduced.
If the held amount hasn’t been released after 15 days, you’ll need to contact your payment provider/bank for more information. FREENOW are not able to speed this process up.