uprade due, did not want, cancelled october 2014

cancelled uprade 20/10/2014 via email, response 28/11/2014 from autopage, will be canncelled, still kept billing us. 8/1/2015 cancellation ref A***, refund ref 548932. 9/1/2015 modem was disconnected, cut off by autopage, can no longer use, good. But still billing us. 3/3/15 refund ref 596271, credit ref A***. still billing us. 4/3/15 cancelled debit orders on my side and let autopage know. 5/3/15 received a statement once again. Above pertains to cell no - ***. I have spent over 2 hours on phone which comes off my minutes to try and get some joy, to no avail.