Closed account, now get spamed

After closing all of my ABSA accounts last week because ABSA did not even bother to get back to me in over 2 months about my credit card not working I now started receiving spam from them. 1st I get a call to increase my credit limit on the card I have just closed, then I get an sms to use it before the fuel price increase to get more benefits. So when it is not working there is absolute silence from them, but when you close it they feel they are free to spam you