Unfair and unreasonable treatment.

I am currently experiencing completely unfair and unreasonable treatment from Standard bank home loans. I have currently got a bond with Standard bank and decided to take an additional amount on the current bond(which is in perfectly good standing, no arears, no late payment and a perfectly good credit score. Now upon applying for the additional amount Standard bank is refusing the loan unless I produce a clearance certificate from debt review, despite the fact that I am not under debt review and have a healthy credit record. Further more it is beyond comprehension why they now require a clearance certificate seeing as the original bond application went of without any problems. In addition I recently obtained vehicle finance with Wesbank which was also granted with no issues at all. Upon enquiring the matter to Standard bank it was confirmed that I was not on debt review, yet they still insist on me submitting a clearance certificate. As further confirmation I sent flawless copies of both Trans union and Experian credit reports in support of my case. According to Standard bank it is their AI system that requires it, and apparently no human being in the whole of Standard bank can do anything about it. I cannot begin to express my absolute disappointment in this whole scenario. I had even considered moving my banking over to Standard bank as I had recently read a article about Standard bank being the top bank in SA.