فَأَصَابَهُمْ سَيِّيَاتُ مَا كَسَبُوا وَالَّذِينَ ظَلَمُوا مِنْ هَوُلاَأء
...
So, the evil results of that which they earned overtook them. And those who did wrong of these...
means, the people who are addressed here,
...
سَيُصِيبُهُمْ سَيِّيَاتُ مَا كَسَبُوا
...
will also be overtaken by the evil results (torment) for that which they earned;
just as happened to those earlier peoples.
...
وَمَا هُم بِمُعْجِزِينَ
and they will never be able to escape.
This is like the Ayah in which Allah tells us how Qarun reacted when his people told him:
...
لااَ تَفْرَحْ إِنَّ اللَّهَ لااَ يُحِبُّ الْفَرِحِينَ
وَابْتَغِ فِيمَأ ءَاتَاكَ اللَّهُ الدَّارَ الاٌّخِرَةَ وَلاَ تَنسَ نَصِيبَكَ مِنَ الدُّنْيَا وَأَحْسِن كَمَأ أَحْسَنَ اللَّهُ إِلَيْكَ وَلاَ تَبْغِ الْفَسَادَ فِى الاٌّرْضِ إِنَّ اللَّهَ لاَ يُحِبُّ الْمُفْسِدِينَ
قَالَ إِنَّمَأ أُوتِيتُهُ عَلَى عِلْمٍ عِندِى أَوَلَمْ يَعْلَمْ أَنَّ اللَّهَ قَدْ أَهْلَكَ مِن قَبْلِهِ مِنَ الْقُرُونِ مَنْ هُوَ أَشَدُّ مِنْهُ قُوَّةً وَأَكْثَرُ جَمْعاً وَلاَ يُسْأَلُ عَن ذُنُوبِهِمُ الْمُجْرِمُونَ
... Do not exult, verily, Allah likes not those who exult.
But seek, with that (wealth) which Allah has bestowed on you, the home of the Hereafter, and forget not your portion of lawful enjoyment in this world; and do good as Allah has been good to you, and seek not mischief in the land. Verily, Allah likes not the corrupters."
He said: "This has been given to me only because of the knowledge I possess."
Did he not know that Allah had destroyed before him generations, men who were stronger than him in might and greater in the amount (of riches) they had collected? But the criminals will not be questioned (immediately) of their sins. (28:76-78)
And Allah says:
وَقَالُواْ نَحْنُ أَكْثَـرُ أَمْوَلاً وَأَوْلَـداً وَمَا نَحْنُ بِمُعَذَّبِينَ
And they say: "We are more in wealth and in children, and we are not going to be punished." (34:35)