And there was for him no company to aid him other than (18:43)

﴿وَلَمْ تَكُن لَّهُ فِئَةٌ يَنصُرُونَهُ مِن دُونِ اللَّهِ وَمَا كَانَ مُنتَصِرًا﴾
[ الكهف: 43]

18:43 And there was for him no company to aid him other than Allah, nor could he defend himself.

This disbeliever had no group to protect him from the punishment that fell on him, whereas he was the one who used to boast about his group.
He himself too could not stop Allah from destroying his garden.

And he had no group of men to help him against Allah, nor could he defend or save himself.

phonetic Transliteration

Walam takun lahu fiatun yansuroonahu min dooni Allahi wama kana muntasiran

Abdullah Yusuf Ali - Translation

Nor had he numbers to help him against Allah, nor was he able to deliver himself.

Safi-ur-Rahman al-Mubarakpuri

And he had no group of men to help him against Allah, nor could he defend (or save) himself.

Page 298 English transliteration