VERY POOR CUSTOMER SERVICE AFTER NUMEROUS CALLS

How many times do I need to call your call centre to cancel the Adsl???? I have cancelled and paid IN FULL in November and it is now May and I receive a final demand letter when this service should have been cancelled months ago.<br> <br> Yesterday I waited on the telephone line for 1 and a half hour trying to get through to the call centre to finally scream at someone to stop sending me invoices and sms' when I CANCELLED THIS SERVICES. No one picked up the telephone!!!!<br> <br> I am fed up with this ridiculous services as the national service provider and if this matter is not resloved and finalised by COB today, I will take to every social media site and deliver my complaint in not such a placid manner as on this website. People will be further aware to move to competitors because of better and COMPETENT service!!!!!