Cashier *****ing money from customers

I bought a meal on the 29th November at Bara chicken licken just before 9pm. I bought Just 4 - soul fire which cost R62.90 and I paid with a bank card. The amount on the invoice is R62.90 but the debit card slip is R87.90. So the cashier charged me more knowing that it is late and I wont check the other slip but the slip with my order number. Cashiers are committing ***** and betraying customers trust.