Spectrum Talent Management — granting me last working day or relieving letter

Address:

400089

I had joined spectrum on 14 dec and was working for your client indiamart... I left indiamart for beter opportunity... Indiamart gave me resignation acceptnce also... But my current company is asking me spectrum last working day mail as i got offer letter from spectrum

I had contacted spectrum they are not giving me last working day mail. My last working day is 9th of april