求翻译：供应商明确指出是针对2011年5月19日时双方业已就价格问题基本达成一致，但家乐福再次提出调整价格的要求，以及在签署正式书面合同一事上表现的毫无诚意而不满。是什么意思？

Supplier expressly that is May 19, 2011 when the two sides have to agree on a price, but Carrefour price demands again, as well as the signing of a formal written contract things not sincere and discontent.