Discovery Insure has completely disregarded my cancellation requests!

On the 20th of April 2019 I sent an official email with all my details to Discovery to cancel my car and home contents insurance policy and I also informed them that I am currently not in the country, so I was uncontactable via my South African cell number via normal phone call. They then sent me two emails between then and now saying they would contact me within 48 hours to confirm the cancellation. I then again informed them they cannot call me on my number, but gave them the alternatives to contact me via WhatsApp OR via email for communication. I received no further feedback, even though I sent numerous requests to find out what is happening about my cancellation and what the final debit order amount will be. Today (13 days after initial cancellation request), the debit order went off with the FULL amount and I am unable to reverse it on my side. This is really shocking service or lack thereof!