Gst amount mistakenly paid as penalty

This penalty will be adjusted in future ...But right now you have make payment

penalty be adjusted against what?

DOnt i need to apply for refund?

basically refund is possible only in two cases as per laws
1. in case of export
2. in case of higher GST rate of output than input
so there is no other refund procedure as prescribed in law
So please send a mail to helpdesk regarding this or you may avail credit of this penalty in future if u will be liable to pay penalty.