Tata Consultancy Services — registration help with tcs alumni portal

I want to request my skills certificate from tcs and i'm not able to register myself on the tcs alumni portal despite filling in all the correct credentials as it is failing with the error that my information is not matching. I had raised a number of tickets (Ticket numbers - 414773, 415639, 418122) from the "contact us" link in the alumni portal regarding the same and did not receive any resolution. I'm not able to contact or reach out to anybody else regarding this issue being an tcs alumni. Please help me get this issue rightly addressed and looked into as i need the registration working urgently.