5.2 In the event that the Sellers fail to perform for the transfer of the Sale Shares to the Buyer as stated in the Clause 3 above, and fail to remedy such breach of performance within 15 days from the date of receipt the default notice from the Buyer, the Buyer shall be entitled to terminate this Agreement immediately by written termination notice and any payment duly paid by the Buyer to the Sellers under this Agreement prior to the termination shall be refunded to the Buyer plus the penalty fee equal to such amount as the full an final settlement of claim and damages.