No notification of no payment received

I bought flat at Swan Ridge and sighned the debit order, so that they can automatically deduct money from my Absa account for the Body Corporate. A year later I was blacklisted for not paying them any money and had huge amounts of dept owed to them, but not once did they contact me via telephone to inform me that I was behind on payment, I did not have an email address by that time. They also threatened to sue me and caused a lot of stress in my life. But I have proof of signing the automatic debit order and when I called the number to make arrangements for all the behind payments they did not help me at all, and they still didn't take any money from my new account at Capitec Bank which I switched over to in March 2016 and despite me making arrangements.