Sharekhan — Account closure- trouble

I have submitted an application for account closure of my demat account with Sharekhan almost 11days back.

They rejected my application for two reasons:
1. Signature mismatch
2. Balance in my account Rs 3 which I am unable to withdraw.

Clearly this shows Sharekhan's unwillingness to close my account.
They have no reason to reject thats why they are showing their dirty tricks.

I am going to approach SEBI in this regard.ue