Don't worry , i also faced same problem but after calling them 100times since yesterday i got connected to one of the KEA official now and they said be patient , they are rectifying the site and soon you will get Print application link from which you can download the final application form.

hello

if you got your transaction successful you must have received a transaction no. you should keep it that no. with you and a evidence from the mode of transfer if done from UPI transaction history or from bank passbook mention and contact your university on the basis of these documents