Insurance letting customer down

I had ***** on my bank account and by accident did not change my banking details with Santam. However they could not even send me an sms to contact them or an email. A letter arrived today 11 November dated 1 October to inform me the account has been closed. I think it is appalling to not even have the curtsy to send me an sms to avail me of the problem. Life is stressful enough and to cope with this as well. Very disappointed in the service. Maybe I should change insurance.