Consumer Redressal

i bought new aircel dongle sim on 24.07.2015 in local retail shop at Rs.150. No: 7402011067. Next day it will activated. I put into that sim in my dongle. Its getting problem of authentication failure i call to customer in my another aircel 3 times call land to executive they said some settings i set that again it will getting same problem. They suddenly cut the call. Next day i try again the cal not connected its replies customer care are busy with other customers. u try again later. I try many time its says repeatedly. Then today i try with another aircel no. It will land to customer care one lady pick the call they told same settings i try again the same thing which was done in last three days. she told to restart i will go with her words to restart. She told u restart and try. But i told just keep in line she told u just try i will connected and cut the suddenly. But again getting same complaint. So, Please do the needful for this issue.