Tata Consultancy Services — No response to ticket and relieving letter not sent

I have resigned from the company in January 2022 and in February I have got Full and final settlement statement from the corporate according to which I had to pay some dues. I have paid the dues to the mentioned account. According to the instructions in the mail, I have raised a ticket in the alumni portal mentioning UTR Number, date of transaction and amount paid by me.

Its been more than 5 days they have not even responded to the ticket. Neither have they provided any acknowledgement of payment. I want the relieving letter urgently as my new employer is asking for it.