Bad bank rating because of your incompetence!! You are the worst bank ever

I had a GREAT credit record and GREAT relationship with FNB until I took out a FNB connect contract and received the worst service ever! I fought with them for MONTHS because they messed up my account, debited me thousands of rands and costing me hours of admin and frustration to sort it out, so much so that I contacted Premier banking to intervene and try help but without luck and then I decided to move to ABSA because of your terrible service. I called a few times to try request to change my FNB connect debit order to my credit card as my salary was now being paid into my ABSA account and it became more difficult to transfer the correct funds into the correct account at the correct time to have funds available for my device payment which bounced a few times but was always recovered when you decided to eventually deduct it and now my bank rating with you is ruined and I have been marked as high risk. I subsequently moved my account back to FNB giving it another try but only to find out you won't help me with anything because of the stupid FNB connect contract. If you look at my history with you before I took out that stupid contract you will see how great my score was, I qualified for a lot of credit I didn't want or took, now I want to apply for a home loan but I can't even get an overdraft for R1000. Everything went wrong when I took out that stupid contract, you should speak to Smart devices and listen to my calls when they delivered the wrong device, billed me incorrectly, overcharging me, etc. I even logged a complaint on Hello Peter for Smart devices and NOBODY even bothered to pick up the phone and talk to me. I honestly will never deal with your bank again if you cannot fix this issue. I will close all my accounts with you and never look back again. 'How may we help you?' should be 'How may be ruin you?'. I really can't believe this.