Hydra Fund Without permission deposited $200 in checking account Internet

Around the last week of April I was inquiring about getting some kind of money to put in my checking account.  I looked into payday advance, loans for 6 months, but never approved any of them.  I received phone calls, but never agreed to anything from any of these companies.

On May 3rd, I saw when I was checking my account online, I saw $200 was deposited in my account on May 3rd.  I had no idea what this was for or who Hydra Fund was.  I looked at my emails to see if anything was sent telling or showing me who had deposited any money in my account - nothing. 

I again, checked my account online and saw that $60 was deducted out of my checking account, without my authorization from Hydra Fund.  I decided to googled Hydra Fund and have sent them an email, as there was no phone contact number for them and in the email asked them to explain themselves, before I go to my bank.  I have not heard anything back.

My fear now is how many times do they continue to take $60 from my account?  Can I get my bank to not allow them to take anymore money out?  Should I change my account?   This is wrong and they should be stopped!