Airtel 4G — invalid sim card

Address:

629001

On december 2017 reliance company stopped its working and they ported there company to airtel 4g but after that till i'm not get accessing to sim card it says "invalid sim" but we contacted many times this service provider and they says we are still working on this issue untill now but no response on the issue so by that i have lost more business contracts by this number my phone number is [protected] it is under my fathers name so please take an action on this company and fix the issue immediately with grand request