Have an account but not enjoying

I have been banking with you for over 4 years now and all of a sudden my savings account is no more linked with my cheque account, I can't view my info on savings on app and my overdraft facility disappeared, I tried going into a branch but due to bad service my efforts failed.. I still can't swipe with my cheque card after all my attempts and always had to transfer to my savings card and now that it's been delinked I'm in big trouble, This bank is sad.