Patient will be Paying Multiple deposit

We understand the standard functionality. As regards the deposit for Hospitals, the case is a particular patient will be paying deposit several times before the final bill is determined and during the course there will be different services rendered for which we raise standard invoice and apply. As the patient keeps paying advance(adhoc) amounts , its not correct to record multiple deposits. In such case creating multiple deposits till the bill is closed will create confusion and difficult to determine the settlement amount.

In this scenario, our requirement is to have the deposit created once and then add further deposits by the patient as Adjustment to the same deposit and have the commitment balance also to update.