Overbilled

I purchased goods at Clicks on the 20th of September 2015. Unfortunately I was billed for 3 Garnier roll ons instead of 2. I went to the store on the 21st to bring this to their attention and the supervisor told me that the cashier who helped me that day is off and I must come back the next day as he needs to confirm with her. I went again the next day and he still told me the same story. At this point I asked what should I do as this was a fault from their side and he told he can't help me until that lady is back. I was disappointed but decided to let a few days pass and I went to the store again on the 30th. I found a different supervisor and told my story to her and she still told me the cashier is not at work. She insisted I give her my contact details and she will call me to sort the error but she hasn't phoned me till now. I'm truly disappointed with the service I received as I'm a regular customer as I buy all my cosmetics, baby things and even medication from there every month. This makes me not want to buy from there anymore.<br> <br>