Cancelled service and post cancellation debit order nightmare

Appauling service. Cancelled my service well in advance. All done via email and telephonically in July and last debit order was suppose to be the 1st of August and cancelled effective 1 September. My debit order has now gone off 2 months in a row despite cancelling the service. No explanation why a proper job was not done in the first place and being told a bunch of stories when I enquire about a refund. Dont even bother responding to emails and dont think that they will make the effort to phone you to sort out anything. Shocking service from Shanar to say the least