No Service From ABSA Call Centre

My client passed away in September 2018, I notified the Deceases department and according to their letter to me they informed the various departments. Unfortunately, they did not do it because I still get credit card statements. I phoned the Deceases Department and they gave me 6 different phone numbers for the ABSA Card Division, 2 numbers are constantly ringing and the other 4 are not working. I really think it's pathetic. According to the deceased department, cancelling of credit card has nothing to do with them and they can't help me but the people working with it don't answer their phones.