Transaction timing

There is a huge problem with the way standard bank handles transactions. I paid my hair appointment last week 13 January and still it has not been deducted from my bank account, I get the notification of the transaction but if I log into internet banking its not reflected there. You are never able to know the actual amount available in your account because of that. And its not just one of two transactions, this happens on a daily basis so now I must walk around with a pen and paper to keep track of my transaction and calculate my balance myself. I have phoned them in the past but they just say that is how it works. Not one of the other banks work like that.