money lost

Monday i went to withdraw money at cimb bank..after i withdraw the money, my resit show my account balance remain three hundred more instead of seven thousand more... omg!! i was frightened, where are my money gone to? i call my friend immediately, but she said nothing happen in her account! how come my money lost?another day, i apply half day leave, n going to the bank ask wat is happening? the bank manager check for me, he said the school transfer 7 thousand from my bank, and i paid another 7 thousand to the school again so i paid fourteen thousand for my school fee, becoz the ptptn debit ten thousand to my account, and 7 thousand is for school fee! i hate klmu very much, if want to take money from my account please inform la, don't simply take my money from my account silently!!omg