The customer isn't always right at maytex, megalinen factory shop

I was followed around constantly by a sales person as though I'm a *****. To make matters worse, the marked price of two items I was purchasing was suddenly changed to almost 4 times the price and they flatly refused to give it to me at the marked price. All I heard was excuses about pricing errors whilst the guy at the till played on his phone, obviously being very dismissive and rude.