Airtel — not allowing me to port my number - airtel,

Address: Jamia Nagar, Okhla Village, Katihar, Bihar, 110025

My airtel number : [protected]
Name : sohail ahmed

I am transferred from assam to delhi region, but my number is not transforming from ne region to delhi region, because of that i am unable to use my call service & 4g internet data since last one year (For which i m paying) and paying every month more than inr 700 bill.
As my plan is 499/ per month.
I visited airtel office (Nfc – new delhi) more than 20 times, every time they are saying my region will be update and i shall be able to use my number without any disturbance and use 4g internet.

As per airtel office (Nfc - delhi) i have generated more than 10 time port number but no use, since last 14-15 months i have paid more than inr 9000 and was waiting for solve the issue. But airtel has no respect and care for the customer.
Now i want to change my service provider, but airtel is not generating new port number so that i can switch my service provider.

Please resolve my issue as earlier, so that i may able to use my money which i m am paying.

Thanks & regards