Mark the order as paid automatically

Hello,
when we receive an order in wix stores with manual payment method, is there any way to mark the order as paid automatically??
I want to update product quantity in inventory once the customer finish the order.
thank you in advance.

can you help me?
since it is a big problem if more than one customer buy the last product before I Mark the order as paid

must I contact wix support??

if you are concerned you can vote for this feature