Your kind feedback to me before/by Wednesday would be highly appreciated.这个是非常正式的商业用语。如果关系稍好点,就可以用:Please kindly get back to me by/before Wednesday.Please give me your kind response by/before Wednesday.Please response me back by/before Wednesday.Please give me your kind feedback by/before Wednesday.希望我的回答能够帮助你,谢谢采纳!