unauthorized debit order

I have not had funds in my bank account due to being unemployed, but I recently had a friend deposit me R1200, I then used R700 of that money, but then something strange happened this week, a debit order of R75.00 went off on my account, it's registered as a standard bank funeral cover, and yet I have not authorized such. So now Standard bank just simply went into my bank account and took what they were not supposed to take. Please put back my money, I don't want to say reverse the charge because I know you guys charge for reversed debits. I hope this will be resolved speedily.