Still getting debited from 8ncorrect account via payfast

Hi webafrica, I can't seem to email billing department only whatsapp support I have tried this 3 times on your system I also confirmed with whatsapp agents is it changed and I can see on the customer zone its changed. All I wanted was to change banking details as my father is now the owner of the account not me and i did this on your website 3 times yet I still get deducted from payfast on your side. I filled in the forms changed it online yet still getting deducted please assist me?