RTO India — not issuing the renewed driving licence applied in gaya rto office

Address:

RAMNA ROAD NEAR GAUDIYA MATH TEMPLE, Gaya, Bihar, 823001

I had applied for the renewal of my driving licence in RTO office in Gaya in March, 2018. Now it is 31 March 2019 and I have still not got my renewed driving licence back.
The reciept I have recieved is also not clearly printed only reciept number is clear and that is 18883145.
I tried many times to enquire about my application but they always tell me that your reciept is not clear so they are unable to tell anything about the application. I have already submitted the original licence book at the time of applying for renewal of application.
Please help me to get rid of my problem.