我想你应该是邮件形式联系的,按你的这个写作方式.因此你只要复制粘贴就好了,把第一个XX改成对方的名字,第二个XX谢你自己的名字.
Dear XX,
Do I get a wrong meaning? You just told me in last reply letter, If I choose the default delivery (not the faster ones), the price of 3 porcelain plates including the postage just cost £59. But why I should pay for them £67.97 now?
All the best
XX