﴿ فَلَوْلَآ إِذْ جَآءَهُم بَأْسُنَا تَضَرَّعُوا۟ وَلَٰكِن قَسَتْ قُلُوبُهُمْ وَزَيَّنَ لَهُمُ ٱلشَّيْطَٰنُ مَا كَانُوا۟ يَعْمَلُونَ ﴾

“yet when the misfortune decreed by Us befell them, they did not humble themselves, but rather their hearts grew hard, for Satan had made all their doings seem goodly to them.”

If only when Our might Our punishment came upon them they had been humble in other words they were not so even though the necessitating factor was there. But their hearts were hard and would not yield to faith and Satan adorned for them what they were doing in the way of disobedient acts and so they persisted in them.