Use Case Diagram correct or not ?

I'm completing my final year project regarding an online car selling web application and I have to make a Use Case Diagram for the SRS but I'm confused whether I should use Payment and Delivery Management as an Actor and what things should I associate with it ?(Having include and extend statements if it is necessary).And other than that, I would like to know whether my diagram is correct or not. I would highly appreciate some help ! This is the diagram https://imgur.com/a/dEqLAVX these are the functional requirement:

1. Admin Panel:

• Login and logout functionality for the showroom's admin users.

• Ability to add, edit, and manage car inventory.

• Viewing order history for customers.

• Managing prices and availability of cars.

• Generating reports related to car sales, customer orders, and payment methods.

• Managing delivery charges and overseeing order cancellations.

• Tracking and updating payment statuses, including instalment plans.

2. Customer Functions:

• User registration process, including adding personal and guarantors' bank details.

• Login and logout functionality for customers.

• Browsing available cars categorized by car brands and models.

• Selecting the desired city for delivery.

• Placing an order with the option for full payment or an instalment plan.

• Viewing order status and payment details.

• Confirmation message displayed upon successful order placement.

• Option to cancel the order within 24 hours of booking.

• Viewing additional delivery charges for doorstep delivery.

3. Payment and Delivery Management:

• Payment methods to include both full payment and instalment options.

• Ability to calculate additional delivery charges based on customer location.

• Processing and updating payment statuses.

• Order tracking feature to view the current status of car delivery.

• Automatic reminders for instalment payments.