NOT ACTIVATING INTERNET SERVICE

I HAVE RECHARGED WITH 395/-AIRTEL INTERNET CARD ON NO.9784913828 ON 16TH MAR TIL THE TIME AM WRITING THIS COMPLAIN MY FHONE DOESN'T ACTIVATED INTERNET.I AM CALLING AND SENDING SMS 0N 121, 9829012345 AND 9829512345 NO BODY IS ATTAINDIND CALL AND COPLAIN. THIS IS NOT FAIR ABOUT AIRTEL SERVICE FROM NEXT MONTH I AM GOING TO CHANGE MY SIM.