My Bank refuses to assist me

One would think that your bank is there to protect you in an event of any ********** activity taking place on your account, however I was proven wrong. On 13 May 2015, an amount of R900 was taken from my account, I immediately approached my bank to assist and investigate the matter. Upon 5 visits to the branch, the staff are completely unapproachable and helpful and refer me to their call center. Today I am told that they cannot assist me with investigating the matter, or pulling the footage from the withdrawal, or recover the funds. I find this absolutely ridiculous. I have followed process and now will revert to social media to share my experience with this bank. I have reached my point of patience and seek immediate assistance with this matter.