Never deal with insure

In October 2019 a friend of mine passed away. His partner asked me to notify insure in order to cancel his car insurance as it was taken off her bank account. We mailed insure on the 24 October 2019 and attached a copy of the death certificate and a letter from her to cancel the debit order. On 26 October we send a follow up request and received a second automated reply that they will attend to the matter. Today 14 July we again approached them as they are still deducting payment every month. Again we had to mail proof of correspondence re the first time we notified them. The call center assistant only said sorry they didn't receive anything and that she can't help us. ***** is all I can say. We will now have to approach the insurance omnutsman