Only Standard bank would help me

I have been banking with Standard bank for over 20 years. But it seems that does not mean anything to them. Standard bank, my bank, refuses to give a credit card account, vehicle finance, home loan or personal loan. They there is something in my credit record prohibiting me to get any of those. Yet.... In the past two years Capitec bank gave me a credit card account and a personal loan. Nedbank gave me two credit card accounts en MFC (Nedbank) give me vehicle finance last year. Sterns and RCS gave me accounts and Direct Axis gave me a loan. S A Homeloans took over my Bond from Absa (whilst Standard bank refuses to do the same). How is this possible? My own bank refuse me any of the above.

Doesn't it then make sense to close my 20 years old account and open a current account at Nedbank or Capitec rather? The ones who actually assisted me while Standard blatantly refused. To me it seems there is something stuck in Standard banks system and it must be updated. Please explain and give me any reason I must not close my current account with Standard bank and open one at one of the other banks who say my name is perfectly clear on the ITC with very good and high points. It only makes sense to do that. Only at Standard bank I am on the Credit Buro as a negative case. Why?