Refusal to cancel month to month

I took out a month to month FLTE contract as there was no fibre available in my area. A few months ago I moved to a new house where fibre was available and asked for my flte to be cancelled and fibre installed. When taking out the fibre contract I made it clear that the fibre is to be activated once the FLTE is cancelled. I was assured by FLORINA LEFASA that the FLTE would be cancelled the same day as the fibre was activated. This was never done and I am being charged for a service that I am not using. I have sent emails querying why the FLTE has not been cancelled and the emails are just being ignored. At this point I want everything cancelled.