WORST EXPERIENCE AT IDENTITY SOUTHGATE MALL

I just got the worst experience from Identity Southgate Mall from they`re employee number *** and a very rude manager. Identity says everytime you buy something from them you need to write it in a diarry and everytime you pay you have to do own deductions from your diarry otherwise you will not be able to buy next time just because the only way they can verify that you are the writefully owner of your account is when you keep the current balance owing in your head and thats very low of you. You could have said you verify your clients by sending otp to my phone ,asking for my Id , fingerprint verification ,method of payment or even asking what is my credit limit not balance and mind you its December time and people are busy buying for their kids and the worry that customers needs to have is finding the right sizes and the nice designs they want and not balancing your accounts.IF i may who buys gcoceries at a supermarket and keep record that yesterday i bought for R539 last week monday i bought for R209?