stick to your guns
/ˌstɪk tə jə ˈɡʌnz/idiom
to refuse to change your opinion or decision, even when others disagree
стоять на своём
Русский аналог: «стоять на своём»
Похожее выражение — stand your ground. Обычно звучит одобрительно: человек не сдался под давлением.
“Everyone criticised her, but she stuck to her guns.”
“If you believe you’re right, stick to your guns.”
“The referee stuck to his guns and the goal stood.”