Currently you either do not have these features, or you do not have them enabled.
Despite this, you can still purchase your tickets, using 2 simple steps.
STEP 1: Below,
select the type of ticket you widht to purchase,
enter the number of tickets you wish to purchase,
then click Reserve Tickets.
STEP 2: Finally, once you have successfully Reserved all your desired Tickets,
click Proceed to Cart to complete your order.