Back Ground Check In Case Of Closure Of Previous Company

Hi Team,
I have the offer from TCS and it has been more than a month i joined TCS and deployed into project as well.
I am afraid of the Backround check as my previous company has got shut down. I have submitted all the required document to TCS and have completed the background check process of email to my past employer and verification of my residence temprorary and permanent both.
Lastly my manager received a call from the 3rd party to verify for the employer location verification but it has been 2 days they didn't turn up.
I am afraid that what should i do.
Please assist

Dear Arushi,
I can understand your anxiety, however, closure of your previous company was beyond your area of control. We should worry about the things on which we have control. For the activities beyond our control, no point in worrying. It could affect your health.
Closure of your previous company apart, what evidence do you have to show that you had worked in that company? Do you have pay slips? Was monthly salary credited to your salary account? If yes, then do you have bank statement?
For how many years did you work in previous company? Did they issue Form 16 to you? Did they deduct TDS? If yes, has deduction been reflected on As-26?
All the best!
Dinesh Divekar