Hello,
So the refund process should still all be handled by WooCommerce we do not modify that process.
Did you go to the Orders section of WooCommerce and in that Order refund it? Did you see this button there like this:

If Paypal did not do the refund using that button, you would have to go into your account to refund them in Paypal.
Also, refunding an Order in WooCommerce does not change the ticket in the Event, they are two separate systems and in the tickets for the event you have to delete them there.
Finally, the customer’s account is with all other Users in WordPress.
Let me know if you have any follow up questions.
Thanks