Withdrawal on the purchased product is now cheap?

I bought a laptop a few days ago and ordered it by pickup and payment selected in the market. But now, I want to give the product back, but as I have seen, it now costs only 599 euro and not as much as I bought it. My question is, do I get the money, the 700 euro that I have invested, or only the 599 euro, although at that time I paid only 700 euro.

You get the money back.

It applies what is on your receipt or bill. Absolutely no matter how much the price is lowered in hindsight. So get everything back.