Investec bank disappointment

I have been with Investec for 6 years and the first 2 years were amazing. The private bankers were efficient, the app was great. It slowly deteriorated now as I type this I made scheduled payments then I deleted all more than a week before the date they were supposed to go through but one of the payment went through. I called customer service immediately to reverse it but I was told that it’s not guaranteed that it will reverse and that it will take 14 working days to process it also I have to pay a fee. I am still trying to figure out how the payment went through if it was no longer scheduled and yet I must pay a fee and wait 14 working days. I am beyond disappointed and I am definitely changing banks. I used to think Investec was better but it’s not.