Every time you PayWave, your bank tries to authorise the pre-selected amount against your credit limit. If you have scanned your card multiple times don’t worry, you will only be charged for the value of the water you have taken. The amounts that have been pre-authorised will initially be held against your credit balance by your bank as pending transactions. Once your bank has determined that you did not take the water, they will release the funds back into your account. The timeframe for this will depend on your bank and can be up to 7 days.
If you have questions or concerns about the balance of your pre-authorisation please contact your bank directly.