Excuse me my question is that if we don’t want to pay online can’t we pay at the door when we arrive.

No you cant

I didn't see anyone selling tickets .. they were making people go on there phones to buy tickets.. save yourself the time and just pre buy everything online.

You can buy your tickets at the box office but there is a long line. To avoid the long line they want you pay online.

I dont believe they have anyone selling physical tickets here.