Kindly refer to the following links:
Whats the ruling of a marriage with no wali? (website)
A woman's marriage without the consent of her wali (guardian)
Does a divorced woman need consent of her guardian (Wali) to marry for a second time
Can my brother be my wali / guardian if my father rejects the guy I want to marry?
How can a woman get Married if her Wali is in another country? | Sheikh Assim Al Hakeem
Can a father who does not pray be the wali (guardian) for his daughter's marriage?
Marriage without the consent of the woman's wali - Hanafi Madhab
Is marriage invalid if the bride's father (wali) didn't propose to the Groom during the nikah? How to fix this? (Hanafi Madhab)
If Imam conducts the Nikkah instead of the father, is the marriage valid? ijab and qubool
I married my wife without her father's consent, is our marriage valid (local fatwa)
A woman married without her father's consent, left her "husband", can she remarry?