Air India Express — Ticket cancellation

Dear Sir/Madam I have purchased 4 tickets under the PNR no.VMLO4A (2 adults 1 kid and one infant) .due to some reason we decided to change our return travel date from 18th August to 1st August but the ticket change option didn't worked online it was showing an error message "infant age should be 0-1 yr" i called Air India express call center in India to get a clarity on this Mr.Niyas the person who attended the call advised me to cancel my infant's return ticket and rebook as child as he became 2 yr + on the return travel date as suggested by your malayalam customer care executive Mr.Niyas i tried to cancel my infant's ticket for this i have loggin in to manage booking portal and selected my infant name and cancelled his ticket i didn't selected other passenger names but unfortunately the entire PNR got cancelled this may be an error Happened with Air India's portal I request you to reinstate the status of our booking and help us to travel on the decided date.Best regardsPhilip GeorgeAbu Dhabi, United Arab Emirates[protected]