Tata Consultancy Services — tata consultancy services unable to register to tcs alumni portal (urgent)

I am an ex employee of tcs and trying to register to tcs alumni portal to submit my proof of settlement payment. However, i am unable to register myself on the portal.

I got an email saying that "details provided by you are not matching with the one you had during your tenure at tcs". I have raised a ticket (Ticket number : 338269) from the "contact us" option mentioning the same issue but haven't heard back in a week.

Kindly resolve as soon as possible, since i have to submit my proof of payment within 15 days and it has already been 10 days.

Thanks,
Shrestha choudhury