Unauthorised debit order

My mom cancelled her alarm system on 18 March. Acknowledgment from national security was given.I've tried calling National between 21-24 April to reconfirm the cancellation, just to be extra sure. Every time I called I was told that the service is still active even though no signal from the residence was received?????? Eventually I managed to get hold of Nelia Dalton in the cancellations department who stated that no email was received. I then sent through the necessary email which was sent for cancellation and she then advised that the alarm system was cancelled. I then asked her, TWICE, if the debit order would be coming off at the end of April, and she reassuared reassured that it will not and that that as of 1 May, we will no longer be serviced by National Security and Fire. Can you believe my anger when my mom called me this morning stating that the debit order went off????? What in earth is happening. Do you guys think that you can ***** money from people and get away with it. And judging from all the complaints on here, this is what you guys are known for. My mom has been with you guys for close to 30 years. She thought she was finally rid of you guys... Then boom! She'll be in contact with the ombudsman. This is definitely not going to happen again.