******** subscription charges

A few months ago I received a call from someone offering me a data trial and that I would be able to cancel it without being charged.I then called letting them know I would like to cancel it,she confirmed cancellation but since then I have been receiving subscriptions billed to my account which I did not sign up for.I have made several calls,sent emails,gone to the store but instead of getting assistance to resolve the problem, I have people calling me daily about paying my bill,I then refer them to the notes on my account and then the famous words"Oh it's been escalated."So if it's been escalated,why are you calling me without a solution?After being a loyal customer for all these years this is how you treat your customers?I will be taking this further if I don't receive immediate assistance to resolve this problem.