Just write to the normal credit card support team and ask if the card ending in xxxx is LTF or not. They will reply in 1-2 days. Then if it's not, you escalate to nodal officer.
My Safari credit card is FYF only. As the card anniversary is in May this year, I called them today to request for LTF but the lady did not budge, so I asked for cancellation. She did offer me full charges reversal but only after I'm billed for the charges (which is in May), I still asked her to...
BTW how did you activated the sweep in facility in the first place? Did you have to visit the branch and open a normal FD first and then convert it into a sweep-in type? What is the minimum balance after which the amount gets the FD interest rate?
@RockyBond for the third time, did you use the same number (when you had the card) or used a different number (which you used for the first two times)?