Changing an account to debit order, after client has passed away

A lady called me looking for my mom as she had not paid her premiums for 2 months. I explained that my mom passed away in August, which is why she obviously could not pay. I asked if the lady could assist with winding up her estate, since she had been a paying member. The lady on the phone said she would get back to me. I gave her my email address. A few hours later an email comes into my mothers email inbox, which I luckily have access to, stating that her payment has been switched to debit order as per HER request. I am incredibly upset and feel this is very inappropriate and immoral.