Airtel GSM
Incoming n outgoing first two calls cant hear any voice

Respected Sir/Madam,

I Amit Marmat using airtel no. 9892670860, since from 2 months as i receives call or i do any call, i cant hear the opposite persons voice so i change my cell 4 time so i know that my mobiles r fine n airtel service having some problem so i complain on customer care so they just said to change the setting n after i did it, but than also i m facing the same problem n now i m unable to call customer care, Plz help as my time n money is waisting through this calls problem.