HELP Needed!!! Facing issues for closing the credit card simpliFi

Hello Dimers, On March 6th, I reached out to the Fi customer care team via their chat support to request the closure of my SimpliFi credit card. On March 13th, I received an SMS confirmation from Federal Bank stating that my credit card had been closed as per my request. However, when I attempted to redeem my fixed deposit linked to the secure credit card, I encountered an issue where it consistently showed an unsuccessful message. Subsequently, I raised another ticket with them, expressing my inability to redeem the fixed deposit. After a few days, I received a response stating that since my credit card was closed, I should be able to redeem the fixed deposit. However, upon checking my Fi application, I found that the card was still under a blocked status, with a current outstanding amount of 13.5k, despite no transaction history being displayed for that outstanding balance. This discrepancy has left me frustrated. Although I haven't made any transactions with the blocked card, it still shows an outstanding balance. I have raised another request to address this issue. How should I handle this situation? Can I report it to the RBI? What category does Fi fall under?