You order a vacuum cleaner online, priced at $1000. When you receive the vacuum cleaner, you are surprised to discover it is not the one you paid for. You contact the seller, who admits the mistake. The seller assures you, however, that the product you got is better than the one you bought. Indeed, the cleaner you received is priced at $1200.

Required: Can you nevertheless claim you have the contractual right to receive the specific vacuum cleaner you ordered? Explain, employing the relevant terminology?