Unfairly placed on Capitec's Internal Black List

Good day, if I could give you no stars, I would. I recently app**** for a credit card with your bank, only to be declined with a message saying that one or more of your accounts have been handed over due to non-payment. I contacted the Collections Department as I have not had any communication regarding any outstanding balance owing to Capitec from either Capitec or any debt collector, nor have I acknowledged debt, either in writing or verbally, not made any payment towards the outstanding amount, nor have I promised to pay. I was told that Capitec cannot assist me in this regard and was told to contact the debt collector that I have never heard of. The best of it is that this debt does not appear on my credit reports and therefore does not exist. The jest is that Capitec has appeared to have "blacklisted" me on their own internal systems without any reason. I wanted to move my account to Capitec, however, I am so glad I didn't as this is not a bank that I am willing to give my money to.