Deactivation of PAN through AO

Client by mistake applied for new PAN instead of PAN correction.duplicate PAN allotted.

Applied for PAN correction again but NSDL sent email that there is duplicate PAN with corrected Name,DOB & father name.The PAN application is on hold since two years.

NSDL given direction visit AO.

One year back,Surrendered the duplicate PAN by client and submitted the letter and also a non judicial stamp which is also notarized...

But AO didn't deactivate the PAN till date.

Escalated to NSDL again but they said AO must deactivate it.

Anybody come across this situation??