By law, the seller does not deliver things according to the criteria and determine the time of the contract. The seller has the right to ask to extend the contract is made.
By law, that is why the seller can not deliver the goods as a condition. And the timing of this agreement. The seller has the right to extend the contract.
According to cause the seller could not deliver the goods according to conditions. And timing of this promise. The seller has the right to extend the contract.