Aircel — unable to generate upc code to port my aircel number

Address:

Gorakhpur, Uttar Pradesh, 273008

I am not recieving any network signal in my aircel no. Since more than 2 weeks. Whenever i try to generate porting code, the reply message says my mobile number isn't correct. How's that possible when i'm using this no. For more than 3-4 years. I even linked my aadhar to it. Kindly resolve this matter as soon possible because i can't close this no.