When seller missed out some of the paid item, seller might give us voucher to claim for what we have paid, but we need to pay for the shipping fees again as the free shipping voucher is not easy to get nowaday, and we need to reach the min. spend once more even if we have free shipping voucher. Chatted with Shopee but no better solution, seems like it's better to request for refund for this kind of situation. Hope that sellers can be more careful with the order and Shopee can be more considerate