Hello, one month ago my database was deleted I do not know who I was ending My server ep 4.5 and when I met some stranger on my site I did not know what it was I did not understand why it happened I use ps_login from nubness SQL port was all blocked, someone knows some tool to protect your SQL This is annoying I am studying about this problem of injection more so far I do not recognize the fault has as they invade database with other system as it arranges this error somebody can help me thank a strong hug

After 1 hours I tried connect to Database say no item and can't do nothing Please help me?
Someone made me cry....