Hi Shugumaran Gopal, you can purchase a new EZ-Link Card from

1) TransitLink Ticket Offices and Concession Card Replacement Offices located at MRT stations and bus interchanges.

2) Passenger Service Centres within most MRT stations.

3) 7-Eleven stores

For more info, you can read here https://www.ezlink.com.sg/get-your-ez-link-card/where-the-cards-are-sold