Same product Showing different prices at same time

I was trying to order a product ‘Ustraa men facewash’ it was showing price ₹109. When I added it to cart, the price was increased to ₹199. I complained about it to amazon customer service but they said “its just a minor technical error and they wil solve it. But you have to buy the product only at ₹199” but why should I? Its their fault, not mine. I want the product at price I saw…