VERY sorry to write, because we have not received any satisfactory answer from Cleartrip Mumbai office from last 15 days, so today I came to your Cleartrip office from Vadodara i. E. 400 Km travelling

While booking, Travelers Information page on Cleartrip site indicate that
IMPORTANT: Make sure the names you enter match the way they appear on your passport
So, We have booked above tickets as per the way they appear on passport.
As under for 4 person
Mr. Mehta Pawanraj Sohanraj
Mr. Shah Priteshkumar Hasmukhlal
Mr. Gadhia Chhaganlal Gokalbhai
Mr. PATEL KULINCHANDRA RAMANLAL

There is NOT a SINGLE MISTAKE in Name of ANY Passenger, it is as appear on the passport

But now your Cleartrip repling that surname require last as under

Mr. Pawanraj Sohanraj Mehta
Mr. Priteshkumar Haskukhlal Shah
Mr Chhaganlal Gokalbhai Gadhia
Mr Kulinchandra Ramanlal Patel

So, you have to cancel your ticket and re-book.

Now Most Important is: on your online portal fields are First Name and Last Name

On Passport fields are Surname and Given Name,
There are no such fields like First Name and Last Name on passport
So, It's confusing on part of cleartrip, so its your mistake.

So, kindly needful to correct tickets as per airline.

Currently this matter is taking care by Mr. Conrad (Cleartrip Mumbai Office)