put your foot down

She put her foot down and refused to work any more overtime without extra pay.她态度坚决，拒绝在没有额外报酬的情况下再进行任何加班。

He finally put his foot down and told the client that constant last-minute changes were not acceptable.他最终态度强硬地告诉客户，持续在最后关头做改动是不可接受的。