amateurcoder

I have a website that is built on Wordpress. There is a payment page https://ministryofcleaning.com.au/pay-now to accept payments from customers, the submit button works on PC, but doesn't work on mobile. You can't click the button when browsing using mobile. I am sure if should be a very quick fix, I have looked through the code multiple times, it looks fine to me, but doesn't work, and it's killing me. I will really appreciate any inputs.