Hair for Hair

So I am not the only one who feels the same way about this gigantic beauty store repaying their loyal customers by stacking up their price. Every time I come in there will be a different sales associate who claims they're either owner/part-owner. I bought a box of metal clips for hair extension for $15, and no sales tax. A month later, I came back this time a different person gave me a price of $20 for the very same brand, model, size, color hair metal clips and tax was added. All of sudden I paid almost $7 more for the same product that I had just purchased a month before : (

ive been buying my hair extentions from this place since they opened and everytime i go in i buy the same kind of hair and same lenght but everytime i come in they give me a higher price!! that is usually atleast 50 dollars or more higher than what i bought it for a couple months back> its pathetic that such a big company doesnt have stable prices. when you tell them the price is exaggerating that they sold it to you cheaper a while back they make up some story about how the hair is worth a lot more and there giving you a discount! when the first time I bought it i paid 130.00 and this last time i had to pay 180.00.