how can we purchase tickets as i see the whole summer is greyed out as well as no one is picking up the customer service line

It is really crowded and worth waiting untill it fully opens up in late summer or fall.

You will have to keep looking. It really is booked. Also, try early in the morning

Tickets must not have been released when you looked, complete opening tickets until November 28th are available now.

I agree with Anthony. We purchased the season pass back on 2019, which carried over to 2021 as it was completely shut down in 2020. With that being said, it's actually not even officially open. The tickets should be available when they officially open, me thinks.