ICICI Bank — didn't receive relieving letter

Address:

Adyar,near Chennai corporation office, chennai, Chennai, Tamil Nadu

Dear sir/mam,
I was working in icici bank as customer service officer from 27th march 2015 to june 2018. Since i had family issues such as my mom's bad health condition and my grandma in death bed i had to quit without serving notice period of 90days as per my experience. My grandmother passed away in november 2018 after which i started searching for new job in banking domain but unable to get it without relieving letter. Kindly help me get my relieving letter since i had no intention in quiting my job at that particular time.

Regards,
Preethi nathalia. L