Selection in TCS

I recently received an email from TCS stating that I have been selected and need to submit documents to proceed with the offer letter. I have 3.9 years of overall experience, having worked previously at Infosys and DRDO. However, I also previously worked at an NON IT company in a BPO for 2-3 months, where I was a permanent employee with the designation of Chief Executive Officer. Since it was a BPO role, I left the job after being selected by Infosys. There was no notice period at that BPO, and they released me within a week. Unfortunately, I do not have a relieving or experience letter from that company, although they had created a PF account for me. Now, TCS is asking for a relieving experience letter from that company. Any idea what to do now?