Money taken from capitec but cant show transaction on my statement

So sick and tired of loosing money to capitec bank. On th 28th of February capitec claim my account went into minus due to a technical erroe from there side, i have two accounts where i need to tranfer from the one in order to swipe with card, i in no way would be able or tranfer a amount that was not there, capitec claim this is what happened. When i ask why this has no reflection on my bank statement i have been told it will update when they do. This is not fair as I did not use this money, and its steeling from capitec to take the money from me but not prove where the incorrect or error happened.