Did not resigned from an IT company 7 years back, now require work experience and Duty letter.

Hi, I was working with an IT firm 7 years back. After getting married I moved abroad without officially resigning from my job. I had a bond of 1.5 lakhs to serve for two years; however, I served only 1.5 years before leaving. I ignored employer emails and did not respond to the notices as I decided not to return to the IT industry in future. Now, I need work experience and duty letter from the employer for immigration purposes. I reached out to the HR for the same, they asked me to use the online website/tool to request the work experience and duty letter. On the employer online website/tool, it is not identifying me as their formal employee. I believe it could be due to fact that I absconded without resigning from the job. I desperately needed the work experience and duty letter from this employer in next 20-30 days. I am not sure what should be my next step to obtain the required document. I am afraid the moment I tell HR, how I left the organization they gonna start asking me to pay the 1.5 Lakh of bond money as well as money for not serving the notice period. Please advice what should I do and how should I proceed in this situation.