Background Check - I have not worked for the last 7 years?

I have not worked for the last 7 years. I want to work now in about 3-4 months.

I have experience of 29 months but I dont have an offer letter from HCL. I have deleted that by chance.

I dont have the contact numbers of the Managers too.I am not able to get in touch with phone numbers which are mentioned in relieving and experience letters.

I worked in Marfic technologies in Bangalore which got closed then HCL. I lost the offer letter of HCL.

Then I worked in Convergys which was overtaken by Concentrix.

I dont have the phone numbers of all the managers who got changed and the offer letter from HCL.

Please help me with the information on what I can do.

Since you have not been working for the past 7 years, the past employment for 29 months is not of much help particularly since you have no documentary proof of it. Though you can mention the previous employment history in resume, most recruiters will consider you only as a fresh candidate. Don't be upset over this. You shall accept whatever employment opportunity comes to you and once you pick up 2-3 years of experience you can look for a proper placement.