Which Company is this for?
If its for MoldTek Packaging, then there is already a conversation in the MoldTek Packaging thread for how you can convert your warrants to shares.
Posting a reference here: MOLD TEK PACKAGING---dividend plus growth - #209 by nevds.365
Please go through the post for reference.
The process should be the same for any other company, you just need the escrow account to which you have to deposit your warrants, and the reason code.
You will have to fill up the DIS slip and submit it to your DP(In your case Zerodha). You can check with your DP on how to go about submitting the DIS slip to them.