I faced a similar situation.
Tata neu Continuously sent me LTF SMS and E-Mail but on App only FYF is written.
Then I got confirmation from Twitter team of Tata neu that App is facing technical glitch, if you have recived LTF communication then You will be issued a LTF Card only.
When Card is Approved, I confirmed with HDFC CC and It was only FYF.
Then I did some Conversion with Twitter team of Tata neu over DM and Next day My card converted into LTF.
But you do not have any proof neither you took any confirmation, you can try your luck by sending an E-Mail.