Who is the wali for nikaah in the absence of the father?

Q: I am a Muslim Arab born and live in the U.K. I'm in the process of marrying an amazing Bengali girl. There's just one problem, her father and mother were divorced ages ago and she hasn't seen her father in 4 years. She has tried to contact him to be her wali as that's what the Quran says but no reply. It's been about a week and half but we want the nikah to be as quick as possible so we don't delay it. What should we do? Should we wait till her father replys no matter how long we wait? Her father has no family here in the U.K. either?

Turning to Allah Ta'ala for assistance

Q: I dont know how to start but I just want to talk about cancer which my mom is suffering from. We just came from the doctor and he said that the cancer has spread and has no cure. My mother is a very good person. I dont know how to explain to you but what do I do about this disease? The doctor said that she will never be fine. Can you advise me the best on what to do? I do pray alot and I have hope in Allah Ta'ala.

Attending a wedding in a hall

Q: My elder sister invited me to her daughter's wedding. I told her that after reading Behashti Zewar by Maulana Ashraf Ali Thanvi, I have decided not to go to weddings especially those which are arranged in marriage halls. She got really offended by hearing this. Later on, my brother in law contacted Ulama in Dubai and Pakistan and they gave him a fatwa that women attending the wedding is permissible provided there is segregation of males and females, no photography or music. They contacted Ahmed Mian Thanvi in Lahore and asked him to perform the nikah. By his presence they made me sure that it is permissible. Bahishti zewar is not like Quran, it could be tempered with or it does not stand applicable for today. They said that I am severing relationships and I am being an extremist whereas Islam is a Deen of moderation. My sister stopped contacting me and started evading me. My other brother and sister also got offended with me.

What am I supposed to do now. I am also very much hurt. They say that why do you contact Ulama in South Africa when we have so many Ulama in Pakistan and Dubai. Why are you following a tareeq so queer and strange. They believe that I have become deviant. If I remain quiet and do not contact my sister will I be accountable for severing the relationship?