Cell C Get More sold a benefit program to me for R69 pm but the app doesn't work and no OTP is sent to verify the account

Cell C Get More sold a benefit program to me for R69 pm but the app doesn't work and no OTP is sent to verify the account. They will charge the amount from my account but disappear in thin air if you request any service. So now I will be paying R69 extra on my Cell C account for nothing.