Airtel 4G — single and internet speed problem

Address:

Ramjanki mandir gobrahi jaynagar bihai, 847226

I am in gobrahi bihar pin code 847226 mobile number is [protected]
I am facing low internet speed and network single problem from long time i am trying to communicate with airtel customer care but the customer care toll free number 121.198, is not working airtel saying invalid number like this kind of service company is making us fool and miss guiding with their customer the tv commercial that the network of airtel4g is the fastest but this all is fake