CheapFareGuru.com / AirTkt.com / Eros Tours & Travel review: Bill me monthly

I had bought an airplane ticket online from AirTkt Eros Tours and the shoppers advantage card was offered as a way to get a $20 rebate, which I have never received. All you had to do was pay a $1 fee for the service and could cancel it anytime within 30 days to not be billed each month. I called and cancelled this subscription within the 30 days, and two months later was billed for $16.99.