Panind — need refund of application submitted

I submitted change pan request online to panind.

When i look at they are charged me near 500rs and same online application we can do in 120rs.

I shoot email with refund request but no response from panind.
Every time i got automated response that within 2-3 days their representative reach out me.

Almost its 25 days no response from them.

I doubt this company is doing online fraud or something.