Insulted by owner

I bought 3 items but 1 was priced cheaper. The cashier rang all 3 up at the lower price but when asked to auth it her senior said i must pay all 3 at the higher price. The owner walked past and said i must pay 1 at the lower price and the other 2 at the higher price. I pointed out that i've got 3 different responses from them and when i insisted to pay the lower price on all 3 items, the owner verbally insalted me in front of all the customers and walked away without giving me the opportunity to respond. When i left another customer stopped me to say she heard it and agree i was mistreated. Her items where also priced differently and her cashier allowed her to pay the lower price. I noter other items on the shelves where the same item have different prices on each product. This is clearly an issue with the store and i feel deeply mistreated and dissapointed in the way this was handled.