Receiving NSW Kids vouchers

Hi MYOB Community, 

I am seeking advice on best way to account for NSW Active and Creative Kids Vouchers.

Key points:

We run a creative arts program

We issue invoice to parenats

We recieve voucher from parents

We submit voucher to Service NSW

Service NSW pay the voucher in bulk into our bank account (several reimbursements at a time)

When we recieve the payment into our account I cannot find a way to use part of the bulk payment against one invoice. 

Has anyone had any success with this or found a workaround/solution?

TIA