Still being charged for cancelled contracts

Good day<br> <br> On the 4th of April I cancelled and paid up 6 of my 7 accounts. The cancellation documents and proof of payments has been sent to cancellations and I have received feedback that the documents has been received. Also after numerous phonecalls I have been assured that everything has been cancelled<br> <br> Yesterday I received my Statement and I'm still being charged for the cancelled accounts.<br> <br> I have been on the phone for 2 hours trying to get the query sorted but I am being sent from pillar to post and after holding for what seems like hours and having to explain my story every single time I keep getting cut off then i have to phone again and then go through the whole process.<br> <br> This query needs to be sorted today as I refuse to pay the extra amount on this statement. The contracts has been cancelled...and paid up why am I still being charged.<br> <br> Your immediate response will be greatly appreciated