unhappy customer due to pricing discrepancies and being overcharged.

A few day ago, I went into the Bayside store to purchase a mirror. I had seen the price marked at R299 for the Lacey Hall mirror. Upon paying the till price was wrong and it scanned at R399. This was rectified by the supervisor and we had left. I returned yesterday to purchase another mirror and the price tag was removed, so I ofcourse paid the R399 without any complaint, however, I have since been on your website straight after buying the mirror and notice that the "LACEY HALL MIRROR" is marked at R349. Why is there so many discrepancies with your pricing? So in essence, I was OVERCHARGED for the mirror. I'm definitely not happy.