Consumer Redressal

I have a diners credit card no 36088620486038. I had availed EMI FOR Rs 200000 and wanted to preclose the same. I have tried their customer service no 08061606161 but as it is automated and their is no option on automated process for precloseure and the call ends. No operator come on line stating due to covid19 they are operting on minimum staff. I am unable to reach them and hence I paid the full amount back. The bank statement shows still the EMI is pending and they are deducting the amount from the credit of Rs 200000 received. I searched on their website to highlight the problem but there is no redressal mechanisim as all queries are pre mediated and their is no option for preclosure of emi on credit cards and the query is not registered. I have sent a mail to support@hdfc.com but they are yet to acknowledge. I requeset you to kindly resolve the issue as i want to preclose the EMI on credit card and relevant 3% charges they are showing I am ready to pay. Thanking You Yours faithfully P V RAMARAO