Regarding Ecalypse Rental Starter Plugin

Hello,
I am facing so much problem while using Ecalypse Rental Starter plugin, As this is my web page link (https://prepdevserver2.site/24hourstaxiservices/test-page/) on which I am using Ecalypse Rental Starter Plugin. Everything is working fine in the starting but when I select the Location(Delhi to Agra), Pick-up(Any Date) and Return Date(Any Date other then Pick-up date) from the Modify Search, then the result 4 Cars Will be shown. Then by Clicking on the “Book This Car” Option on any resulted car, a new window will open. In this new window the “Call for price” option is not working and in the Bottom of the page there is a text as “This car is not available. Please contact us.”. On this page nothing is working, how can I book any car on this window and there is no link for final booking. Could you please help me out in resolving this issue.

The page I need help with: [log in to see the link]