What should a girl do who faces successive problems despite her kindness and diligence in prayer and reading the Quran, and are there Quranic verses to دفع these problems and "bad luck"?

The best solution to your problem is to turn to Allah in supplication, asking Him to remove your difficulties and rectify your situation, while adhering to patience and obedience and consistently reciting morning and evening remembrances (adhkar). Among the helpful means are associating with righteous women and avoiding sins, as sins are a cause of calamities, as Allah Almighty says: "And whatever strikes you of disaster - it is for what your hands have earned; but He pardons much." Know that Allah may test those He loves, so affliction is not a sign of Allah's displeasure if the servant is patient and seeks reward from Him, for this world is a realm of trial and tribulation.