Bought a second-hand car, but the previous owner refuses to cancel his FASTag. What are my options?

Hey everyone

I recently bought a used car. When I tried to apply for a new IDFC FASTag it got rejected because the previous owner hasn't deactivated his old one.

I contacted his FASTag bank, and they told me his tag is actually hotlisted, has a negative balance, and his KYC needs to be upgraded. They said he needs to complete his KYC, clear the negative balance, and then request to deactivate it before I can apply for a new one in my name.

I called the previous owner and explained all of this so he could cancel it. he called back and basically refused to do all that work and told me to just go to a toll plaza and get a new FASTag from the agents there those agents will be able to give you new one .. I reminded him about the new "One Vehicle, One FASTag" rule, but he just told me to go try with the agents anyway.

What should I do?

I really want a IDFC FASTag because of the max benefits and the good success rate people talk about online. If I buy from those toll plaza agents, can I still opt for an IDFC tag with the max benefits? Or like will they be able to get me a new tag without canceling the old one?

Or

Since the RC is now legally in my name, is there any way I can just force-cancel his old FASTag myself?