Income Tax Department — my pan is under process at income tax department from last 3.5 years

Address:

412101

I had applied for pan correction, but it got stuck at income tax department as there was one more pan got issued on my name, i applied to surrender one pan, it took 2.5 years for that as customer services and other services were slow and not clear, but finally one pan got surrendered in october 2017, and after that income tax customer service and nsdl customer service did not guide me properly, after 7 months of pan surrender income tax customer service said, that my aadhar card is still linked on my deactivated pan. For that i have already sent letter to delhi jhandewalan center (Ncc dit (Pan) ara center jhandewalan new delhi) to delink my aadhar from surrounded pan. But still there is no confirmation about the letter and action and no information about the process regarding this. I am trying to push from income tax customer service, but they are also just saying we have forwarded your complaint on priority basis, call after few days, and when i call then again they repeat same story. And the customer service is not helpful and don't guide properly.

Please help me with this, its already 3.5 years that i have applied for pan correction.
I have sent that letter to ara center on 17 september