Firs national bank? Gha what a joke more like *******!!

FNB the worst bank ever! I am losing money not gaining anything! I buy something it goes on reserved purchase and goes off of the account telling me I have this much left in my account a few days later the money goes off of my account again!! On Fnb you have your balance and you available credit now your balance is everything that has gone off of your available credit but then the money goes off of your available credit again and when phoning into the bank to equiry they have the audacity to tell you that before purchasing the stuff to calculate all the pending purchase and then you will know the amount of money you have left! Why must I bank with a bank that tells me that? Where as I could I could just get the cash and work like that? It goes on reserved purchase for a reason but for the money to go off again off of my account?! Thanks Fnb I am in financial debt because of you and you are so useless that you can’t even help me the only help you offer is to tell me I should go In to the app and calculate everything up. I will not recommend Fnb to anyone I will tell them how **** they are and move to ABSA becuase they clearly understand reserved purchases