Please guys help me solve this serious Matter

OK guys what do you think about this.... The parents of the man didn't want him to marry this lady, he refused and went ahead anyways without their consent.. Years down the line they had 2 kids a boy and a girl, that marriage ended when the kids were both 3 and 1 years respectively. The man remarried to another woman, and this marriage is 23 years with 4 kids.

Now the girl that was 3yrs is now grown up and is ready to get married, she is also been rejected by the guys parents... Now the guy is strong headed and want to proceed without his parents, he went ahead planning till the wedding was called off due to the fact that the church needed the consent of the guys dad..

As it stands the guy still wants to proceed anyways but at low key, so he is trying to pull stings from influcencial relatives and siblings. His siblings who are matured ladies are on the same page as him so are trying to get his dad to change his position.

So they are engaging his dad to let them know why his stance on the matter as a father is hurting his son. While they are doing this, the guys fiance is getting all mad and worked up and keep telling him not to waste her time cuz shes been patient enough and wants the wedding done asap.

As it seems she's the type that have high expectations and get disappointed easily. In addition someone in the past wanted to marry her but changed his mind.

What will you do if in the guys position??