How to understand that "not the build of the laptop"? if the model is the one stated, the Assembly can not be changed. Or You sent the wrong model? Or what is stated, not the inside? Go to the manufacturers website and read about the official "filling".
If the "filling" is different or has really sent the wrong model in mind, the response should be the following.
On hand You have the following documents (correct me if something is not):
1. Account and receipt of payment. The account must specify the model and a brief laptop accessories. If such no — go on the store's website and take a screenshot with the price and thecharacteristics. In some CIS countries require a photo of the monitor with it on film (digital is not considered). If I'm not mistaken, allowed RAW format, so if the tape does not get it.
2. You have the invoice from the courier with the date, name of the sender.
3. You have the payment receipt and completed warranty card which was supposed to come with a laptop.
4. Well, there is actually a laptop.
Now call the store and report that You have all of these documents. Expressly declare that, on the basis of all these documents, it is not even about violations of the Law on protection of consumer rights, and criminal case under article "Fraud". And then just ask if they want such development of events. On the question of the examination, say that the examination is not no need, because stupidly sent the wrong item.
Most shops agree to return shipping and replacement product. Well, or a refund of the difference in value, depending on what You're interested.
If it turned out that the laptop itself was the stuffing (just the store contained errors, and honestly said this), then You can exercise your right to return the product, if less than 14 days after the date of purchase. In this case, You must fully reimburse the cost of, well, not counting the cost of money transfer and delivery. Note that in this case You need to provide your entire equipment, including the original packaging.