Why the price is different at the store
Usually because the price changed after we last read it, or because something is added at checkout.
Our prices are minutes to hours old. We read product feeds every 6 hours and websites every 2 to 6 hours. A store can change its price in between.
The price may need a discount code, membership or an offer that applies to the whole cart. We show the price without codes or membership.
Delivery can cost more than we show, for example to some addresses or for another delivery method. When a store does not tell us its delivery cost, we say so, and the offer comes after offers with a known total.
Some offers come from a seller on a marketplace, not from the marketplace itself. The price, delivery and returns are then that seller's.
A store that ships from outside the EU can add VAT, customs duty and a handling fee, at checkout or on delivery.
If the price is still wrong
Report it with the link on the offer. A report queues a check of the store's own product page, and reported offers are checked first. If a check cannot be done within 6 hours, a person looks at the report instead.
A report never hides or removes an offer.