Nsdl E-Governance Infrastructure — pan-correction, amount has been deducted and not refunder

Address:

HCL Technologies Ltd, Block B2,, Rathinam Techzone,Pollachi Main Road, Echanari-641021, Coimbatore-TN, Coimbatore, Tamil Nadu, 641021

I have applied pan name correction through onlineservice - NSDL Online. Token Ref No. [protected] on 03-Apr-2019. Almost everything done quickly, finally i had re-directed to fees window to complete the application. Then, i used HDFC net banking and amount also paid. Almost more than two months over, still it is not refunded. Same i wrote mail to [protected]@nsdl.co.in Request ID :##517501## on 4-June-2019. How ever there is no response.
Kindly, escalate the issue to concern department resolve my refund issue.
Thanks You.