Credit card telephone harrasment

ABSA credit card has been calling me daily about R260 that i owe them. My account is paid by debit order, so in theory it should be up to date. I made an effort and went to the local branch and asked to speak to a senior manager. She confirmed my debit order is active and all is good. Hours later ABSA called me again. After a long friendly conversation the agent agreed with me and promised to investigate. I'm still waiting for the outcome. (all of this in June 2021) July 2021: The calls kept coming. I wrote an e-mail to ABSA Credit card. I received an answer that my account is up to date, and apologies for the phone calls. But the calls kept coming. Again i am owing R260. Another e-mail to Absa. Zero response. I have now enough of this bank. They have absolutely no respect for their clients.