Is it permissible to cancel the purchase of my two Volvo cars and get a refund, given that I have not received them nor inspected their condition, and that my trust in the seller has been shaken due to his deception in a previous car purchase?

The seller was obligated to disclose the defects of the car, its mileage, and the replacement of its tires, as concealing such information constitutes deception and fraud. If the seller commits fraud, the sale is valid, but sinful, and the buyer has the option either to annul the sale or to uphold it. Therefore, the questioner has the right to annul the sale of the Caprice car due to its defect, but does not have the right to cancel the Volvo car deal as long as no defect was found in it.