Airtel
Not disconnecting STD

Dear Sir,

I several time requested customer care people to disconnect the STD but they did'nt it and some of my colleague or in my home is using STD and i am getting problem from my office becuase that phone is given by my company and company is paying the bill of my phone

when i am asking they are telling that they cannot disconnect GSm STD no.s

but sir normally now everyone is using GSM mobile so the Airtel is cheating sir

please take any action against them

Thanks