India Post — Not receiving the letters from post office

Address: Medak, Andhra Pradesh, 502001

I stay at below address, so far I have not received any letter from Post office, I have checked with HDFC and SBI for credit card delivery status, they are saying we got returned, could you please help me with this.

My Address:
Rahamath Mohammed
H.No: 5-4-168/A/A,
Shanti Nagar Road, Maqdoom Nagar,
Behind Imam Beig Masjid,
Sangareddy, 502001
Telangana, India