Closing of accounts with no particular reason

I am not happy with standard bank. My pursave account was closed with no reason at all. I went to the branch and ask why it was closed and they also had no explanation whatsoever. That account had money but for some reason that money was not transferred to my main account after the account was closed. My money just disappeared. Now getting my money back is a huge challenge for me. Inconveniencing me in every way. I can't even do my errands because my money just disappeared from the face of the earth.