Bad sickening service from standard bank

I have a credit card and a cheque account with standard bank. I had issues with my banking app and no one assisted me in fixing the problem up until I decided to use another bank. They were supposed to debit from my cheque account for the credit card payment which they are not doing. I called them for assistance and no one is assisting me as to why they are not debiting. Standard bank's service is so poor it makes me sick. I don't why they make promises they can't keep. All they are doing is messing my credit record. I'm trying to buy a house but am failing to do so because they are messing my credit record.