Exchange right for defective goods, ordered laptop must be reordered at a higher price?

I had a large online shop where you can buy notebooks "cheaper" a laptop ordered with yellow streaks on the display arrived.

I finished a return request and clicked "exchange goods". The other two options were refund / return and warranty.

The service told me a few days later that the credit was initiated, which I did not want, because the laptop was available at a good price, now it costs again 200 euro more. I explained that I had actually clicked on replacement device, but since it is no longer technically possible I should order again.

After all, a contract was signed by both sides and I did everything right, did not I have a right to a replacement device at the price I paid, even if they failed to read the return request correctly?

Yes, you have the right to delivery of a faultless device.

What if it does not exist anymore?

Or when the Russians come? Had bicycle chain. Obviously, the device still exists. In that sense, the question does not arise.

I had interpreted the wording that an exchange would not be technically possible.

If he can order the same device again, it is obviously still there. Technically, the process is probably just settled in the system and you do not get it just reopened.

Then I do not understand why you could choose that.

Guarantee case would have been the right option, I'm afraid.

Yes, you have. You're absolutely right. It is in the exchange purely to the goods. Any price changes will not or may not be considered. Only because it was more expensive for the dealer, he must not pull out of the affair so. I would write to the company polite but determined that you insist on a replacement / exchange of the defective item. Otherwise, you would "take legal action to enforce your interests" (I had used this passage a few times).

What to choose?