Giving males advantages over females and depriving girls of some of their rights
if the reality is as you mentioned, your father was wrong when
he privileged sons over daughters and deprived his daughters of some of their due rights. The same is equally applied to your brothers who refused to give their sisters the rest of their due share of the inheritance to discharge their responsibility and to keep away from Zhulm (injustice). You did well with your willingness to give your sisters the rest of their due share of inheritance, which had been added to yours.
if your sisters forgive you or forgive all of their brothers, then you have fulfilled your duty and the problem of division is solved. May Allah reward whoever does good, as He loves the good-doers. But if they do not forgive and it is easy to divide the land, you have to give them the rest of their shares in the form of land, even if it is a single lot they would all share in. However, if it is difficult and would cause trouble for you or for them, then fairly estimate their shares of the land and give them the value in the form of cash or anything else that they may accept. If there is no mutual agreement regarding this matter, you and your sisters should (Part No. 16; Page No. 501) consult trustworthy people with discernment and experience to clear up the problem or you can have recourse to the court if necessary. Allah is the One sought for help. May Allah grant us success. May Allah's Peace and Blessings be upon our Prophet Muhammad, his family, and Companions!