Fiber

I've been trying to change from fiber to LTE, it's been a real struggle I was informed to give 2weeks notice on the fiber and did just that. I was inquiring about the bill just to find out my request haven't been transmitted. I present the ref# as to when I put in my request and now I'm told it's a 30 day notice that needs to be given. The aftersales is really bad. They want to double bill me even after presenting them with all the references