FALSE ADVERTISING

I was offered an extra service - GET MORE, WHICH WAS FALSELY ADVERTISED TO ME AND I JOINED IN. The very same month i phoned in to make a booking at a certain restaurant in my area that is when i was told the restaurant is not on their list, whereas when the offer was presented to me i was told i can use any restaurant at any place. i immediately cancelled my service with them, that was in March. In April I did a follow up to check if the service has been cancelled and I was told there is a lot of cancellations on their side and there will be a delay, until the service was cancelled in May 28th. i am not happy that now I have to pay two months service fee of something that I never used and was falsely advertised, and I cannot believe it takes two months just to cancel a service, pure incompetence. This affects my cellphone contract as they keep on cutting my line due to the get more arrears and I phone in and explain they reopen, a month again same thing happens. Can this issue be resolved for good