hi Suraj,
I had the same problems, the range of these NRF24 modules is very limited when using the onboard printed circuit aerial, even the slightest interference causes lost data.
Any object passing between the TX and RX 'line of sight' caused data loss.
I did have a master TX NRF24 talking to 4 remote NRF24 RX units over a distance of 4 to 5 metres, the results were unacceptable. I experimented with added home made dipole aerials with little success.
There are commercial dipole aerials available.
Finally abandoned the NRF modules and used HC12 TXR modules for the project, ranges up to 100 mtrs are not a problem.
E