Hey Anup Kumar das,
Yes you can get the refund of amount what you have paid. Mostly there will be deduction of 10-20% of money from the amount what you paid and the rest will be given back. For the refund process you need to fill an offline application form which is given to you in the Prospectus 2019, And you can submit the form to your nearest city office of LPU. You can check the more details of refund policy here:
https://nest.lpu.in/pdf/Refund-Policy-for-NEST.pdf
You can also track the process of refund here:
https://www.lpu.in/RefundTrackingSystem.aspx
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