Cancellation of Service issue

I have app**** to cancel my dsl package as I no longer require it due to Fibre being installed in my area. The request was made with the consultant in May 2021, and was to be cancelled before mid June . To date I have tried and tried to enquire as to the reason why the DSL line has not been cancelled but no consultant can give any feedback. Each and every one simply says they have to enquire, How difficult is it to cancel a DSL line connection. I am currently being billed for the DSL connection while I am also paying for fibre. This is just unacceptable