Unknown charges and unknown transactions

I thought being a premier banker comes with a lot of benefits but no, it's just getting yourself to be *****ed money in your bank . I left my card with some small money for the sake of it should stay on positive until I get paid . The next day when I checked my account it was on -FOUR HUNDREDS . now again I received some transactions that I didn't make purchase of. So I think i will just start looking for a better bank than being punished like this .