Uti Infrastructure Technology & Services Limited [Utiitsl] — Pan Correction form error

I wanted to correct the spelling of my last name in my PAN for which I filled up the correction form for PAN on your website. However, after the application number being generated I am not able to finish the process further. Whenever i try to finish the process of ensign with aadhar it says there is some error and please try after some time. Despite trying so many times, it shows the same error every time. The customer care number is also not providing any solutions. Everytime they ask me to wait for 7 days. It has almost been a month. I applied on 17th December, 2021 and it is 17th January, 20222, Still my issue is not resolved.

PAN processing coupon number : Q[protected]

I hereby request you to please guide me for the process further and help me resolve the issue at the earliest.