Sodexo Gift passes are rarely accepted on online stores. So you will not be able to use it on Flipkart - at least as of now.
You can redeem them at your local stores like BigBazar, WallMart or other outlets like Spencers, Titan and Nike. The passes have acceptability at select outlets only.
However, Yebhi.com has now commenced to accept Sodexo passes. You may contact their Customer service.
Live....and Let Live!