Making a payment on Booking Calendar:
Go to POS & PAYMENT
Tap the third icon on the left-hand side of the POS page
Select the date that your customer made the booking on
Once step 3 is done, the customer(s) booking details (Time, summary and staff) will be reflected
Tap on the booking details and select PAYMENT
The service will then be added back into the cart (you may add in additional service rendered)
Tap on PAY to choose the payment method
Choose payment method and tap on CONFIRM
Once step 8 is completed, select BACK TO POS
Here's a step-by-step video guide: