They very much need your prayers. If you hear them use God’s name blasphemously, you quietly in your heart say a brif prayer of love and honour to God.
They are injured people, and as Jesus said on the Cross, “Father forgive them. They do not know not what they are doing.” Luke 23:34
It may be the example of your love and gospel living that eventually leads them to accept the graces to reform.
It’s a painful problem. I ask the Holy Spirit to guide you and to bless them and you