Woocoomerce - Product Price Customization

I am working on a wordpress project, theme based It's for an event And people can buy tickets So in woocommerce we only have 1 product which is that ticket And we have certain criteria that would affect the ticket's price on checkout Such as 20% discount if 5+ tickets, different ticket price if from a certain country And if a custom field is filled at checkout which is a text field (no validation or checking to be done here, the user just fills the input), the ticket price also changes I have managed to work on most of them But the last point related to the member ID isn't working as intended and causing problems in the other hooks So it's basically changing the ticket price depending on a few fields on the checkout page And I already wrote most of the code But not everything is fully functional