Mahindra Finance — Letter

I am arun v[protected], was worked at mahindra rural housing finance coimbatore branch in period 3rd february to 13th june.
Therefore some reason i was give my resignation to branch manager as next working day 15th june but they don't give me relieving letter.
But now am wants the relieving letter, so try to understand and please give me the letter.
I will humble request to you as soon as possible you give me the relieving letter