Inglês: turn someone away; let you down; refuse to give help or support.
Português: deixar na mão, recusar um apoio, uma forcinha, uma ajuda.
1.They never turned us away. (https://www.englishexperts.com.br/13-frases-em-ingles-com-expressoes-indispensaveis/
2. She refused to give me support.
3. She doesn't care about you, you know, she let you down.
Other tips, examples and correction are always welcome!
Kisses and Hugs,