Well you don't need to quote 33:59 (Surah Al-Ahzaab) because Surah Al Ahzab is NOT for us , Muslims of today. If you read Qur'an with translation and with context (and commentary etc) , you'd know that those verses were revealed for a SPECIFIC purpose and in a SPECIFIC context and for SPECIAL reasons that appeared in Prophet's times.But today , we these verses don't apply to us ...So leave out that. Now coming to Surah An Nur , yes there are different interpretations but generally it is accepted that this verse does talk about "Hijab" ....Remember , NOT "burka" but Hijab. But again , Hijab is not specifically mentioned so if anyone wants to take a different interpretation , let them do it. Its between them and Allah. And covering head is not everything. A person's heart must be pure/decent etc .... Take Care.