Worst service ever

Hi my name is Chantal, and recently I was contacted by netstar go, about a service that they were selling, at that time I was told about the policy, and benifits, which my husband and I considered due to the teachers giving after hour lessons, we were told all good things about the policy, but was never once mentioned to us that the newer phones don't take this app, I contacted them to find out if there was another way we could use the service, but to no luck, I immediately contacted them to cancel my premium and service, I was told that the matter was being escalated, that was almost a month ago, I contacted them them 2 times after that but they keep promising to call me, today was the last straw, I emailed them regarding the cancelation and was told that between working ours someone is going to call me, Im still waiting and money is being decuted for a service that Im not using, I'm really disappointed and upset, they promise us so much things, but in the end don't keep to their word.. I would never recommend them to anyone, worst service ever