Tata Consultancy Services — Need Justice_TCS blocked me as I have worked for a blacklisted company in 2007

Hello All,
I was interviewed for a position in TCS on December 2021. I have cleared all the technical rounds and TCS Hr (naveen.[protected]@tcs.com) scheduled a Managerial round which i have also cleared, where they discussed about my salary as well. I was asked to submit all the documents in iBegin portal . My EP id is EP2018IR252136. After couple of weeks, i got to know from Mr. Rudra Balla (delivery head who took my interview), that when he followed up with HR regarding my profile, HR confirmed that my profile is blocked as i have worked for a company (Assurgent Technology Solutions pvt ltd), which is in blacklisted list for TCS. And there is no workaround to reinitiate to process my profile .
I have worked in the company in the year, 2007, 2009 (1 year 10 months ) and i have all the proofs, even bank statements where salary got credited . What is my fault in this matter, i was a fellow trainee in that company where i have worked hard to earn my bread. Also if a company is blacklisted, TCS could have asked me to remove that work experience(which i did in ibegin portal as suggested by Mr. Rudra and resubmitted the same ) and they can process it. But straight away they blocked me without my fault . Isn't it unethical behavior from company like TCS, whose social image and values are an example to society.