Someone tempering with my money inside FNB

I have been getting sms that i purchased things that i did not and worse in the middle of the night. This is not an outside **** because i have not used my card in 3 years at any ATM or swipe. This funny thing started happening from July 2015. Now every time i leave money in that account it disappears but does not show on my statement where it went to. Today, R74.00 just disappeared and there is no track where it has gone to. So sick of this bank, it has to be the safe place to keep our moneys but now they are the ones *****ing from us, might as well keep it in my pillow.