Question about Leonardo Novo

When I add 6 of these simple glasses to my cart, I am charged (Galaxus price) the error or extortionate price of 353.40 CHF. The price on the Leonardo website (the 400 ml size does not exist there) for the Leonardo Novo glass is €4.95 for 360 ml or €6.95 for 570 ml. It's horrible how mistakes are made here and these are even confirmed as correct by the staff (see comment 4 (!) years ago by Gabriel Marques!!!) when your customers with some common sense are shy to get in touch. So you have been selling this item for 4 years, probably longer, at over 10 times the price! Despite this, the item is still ranked 366th in the sales rankings. My compliments! A few people will probably fall for it and think they've bought something really exclusive. Shame on you. The fact that the manufacturer and the 'third party supplier' don't realise this or that the 'third party supplier' makes the same mistake with the identical item beats everything! How many more items like this are in your shop with incorrect prices and you don't even realise it after years? Will you reimburse orders that have slipped through or credit the price difference? I would be grateful for an answer from your sales management. I have copied the relevant Internet pages.