Another day same problems - Getting fed up

I have a recurring issue with the bank which has still not been resolved after my and my father have both visited the branch to rectify. It seems to be an IT linking error where my father has access to my account via the ATM . He can see both my account and his account displayed. Previously I was told to visit the bank to remove the linking. My dad also visited his branch to remove any links. My dad opened my account when I was a student and the link was created so he could transfer funds to me. I do consider this as invation of privacy and everytime I need to visit the branch to rectify a mistake I didnt make. Please sort it out without making us come and sit there for hours.