Consumer Redressal

I did MNP from Reliance to airtel.for which i had requested via airtel website after which i received a call from Frontline services PVT limited.they send their person at my place and I paid them security deposit. They promised to get actived within 7days.but now it has been 25days.Sim is not been actived.On inquiring at airtel galary i came to know that security deposit which has been taken from me is actually wrongful.there is no security deposit for MNP customers and details of my cell no. are not shown at airtel galary. I want to file complaint against airtel as well as frontline services private ltd for wrongful commintment of activating within 7 days and even wrongly taking security deposit of 300rs and still not activating connection.