Query unresolved since March 2015 Case #:***4

A complaint was logged in March 2015 (Case Number:***4)regarding extremely slow speed on the LTE advanced product, Each time I call customer services (probably over twelve times now), it takes more than 30 mins and the end I am promised a call back from both the customer services manager and advanced technical department, to date I still await a call or resolution of the matter. I am being billed and my account debited with a substantial amount of money each and every month, but no response to my complaint?<br> I request the service level (speed) be improved to what I am being charged for or if not possible, please cancel contract. I have been patient and push around for far too long now...