Inhumane, threats received from Schulenburg Attorneys representing Intercare

I had no knowledge of my account being handed over to these attorneys and instead of having a conversation, they sent SMSes to make payment of R446. An amount I did not recognize. And so it looked untrusted and a **** so I queried it, multiple times, but no response for days. They finally called me and without explaining to me or hearing my questions, kept telling me they would have to sue and blacklist me. I tried my best to explain that I don't understand it and I just want to understand it, maybe see a statement since they were threatening me just as ****mers would do, demanding money without explaining.

It turned out to be an Intercare account from DR FRYE AND ASSOCIATES INC, which I queried with them as well, many months ago, without reply as I thought there was a mistake on it, since my medical aid told me it was an incorrect code and I shouldn't be liable. It was such a small amount (R200 or something) that I would've gladly paid, I just wanted to understand and query it, but no-one ever got back to me, hence I thought they corrected it with the medical aid.

I tried talking with the lady from Schulenburg but she kept interrupting me, not letting me talk and kept repeating the same line over and over again, that they'll have to sue and it would cost double if they do, and then blacklist me. This is not how you treat people.

I see reviews everywhere, for many years of people saying this exact same thing. I don't know how they could treat people this way, I also don't understand how companies still use lawyers like this, to threaten people in such an inhumane way.