もらえなかった

couldn't get someone to do; wasn't able to have something done for one

→ 貰う
もらえ receive, get + なかっ Negative past + Past tense
auxiliary · past potential Rare #19,808
couldn't get someone to do; wasn't able to have something done for one Used after a verb's て-form to say that someone was unable to receive a favor or have something done for them.
JA: 忙しくて、友達に手伝ってもらえなかった。
EN: I was busy, so I couldn't get my friend to help me.
Conjugation of 貰う
Potential past
もらえなかったもらえた

はっきりいって私の気持ち分かってもらえなかったようです

To be honest, it seems like you didn't understand how I feel.

彼に英語で話しかけた理解してもらえなかった

I spoke to him in English, but he couldn't understand me.

彼はその仕事をやらせてもらえなかった

He wasn’t allowed to do the job.

最初は信じてもらえなかったんだけど、今は信じてくれてる

At first, they didn’t believe me, but now they do.

その話し手話を聞いてもらえなかった

The speaker wasn't listened to.

でも会わせてもらえなかった

But they wouldn't let me meet them.

— サイコ (1960)

私はトム信じてもらえなかった

Tom didn't believe me.

私は彼に自分が正直だということをわかってもらえなかった

I couldn't convince him that I was being honest.

私は英語で理解してもらえなかった

I wasn't understood in English.