Account not being cancelled

at the end of December 2014 we cancelled our lines with Telkom as LCOM took over our lines. I spoke to Joel Morgan on the 23rd April 2015. The nrs ***,***,*** and *** were supposed to be cancelled. After numerous phone calls and emails we still got no joy out of this situation. We keep on receiving account. We spoke to Suzette in Bloemfontein at the call centre and the latest call were to Mr R Ashwell. LCOM also sent numerous request for the cancellation with no action or reply. Please help us.