Citibank — Regarding Settled Credit Card payment - Reference Number[protected]

I was holding CITI bank credit card which is settled in 2014 due to lack of knowledge. But now I have realised and planned to close the account completely, for which I was in discussion with CITI Card collection team. After multiple followups, they have suggested me to pay 16819/- Rs. I have paid this amount through Bill desk using UPI. The money hasbeen debited from my CITI Savings account. Payment was made on 5th Feb 2020. After 1 week of payment, I had called CITI Card collection team and confirmed payment is not received. Since then I was continuosuly follwowing up with CITI card team. They have requested me to share my account statement to confirm whether payment is debited and not credited back due to failure in payment. I have shared all details. Everytime I share any information, new reference number is getting raised. Now I would like CITI bank team to find all details associated in[protected] refernce number and confirm my payment. I am really concerned to close this account soon .