LOL, you have no concept of Calvinism. You have presented your bitterness in this post.May I butt in?
You are asking a Calvinist if Paul had a free will. Calvinist believe that no one has a free will. They believe that we are just a bunch of dumb robots that can't think for themselves. This thinking dishonors God and insults his Son Jesus Christ.
If free-will existed, then humans would stand above God and dictate to God what they will do. God would be powerless to act. God would be a genie who responds to the wishes of his master...humankind.
But, thankfully, God is the supreme ruler over all things. No action within His creation takes place without God's sovereign ordination. When you choose, God says "yes" or God says "no." There is no action you take that is not ordained by God. Even the evil that takes place is allowed by God's patient ordination in accordance with His will for His good and perfect plan. An example of God's ordination over man is the story of Balaam. Balaam was paid by the kings around Canaan to go curse Israel. Every time Balaam attempted to bring a curse, God stopped him. God even caused blessings to come out of Balaam's mouth by God's providential will. Balaam could NOT willfully choose to curse Israel. Why? Because God's ordination and will is supreme over all. Men do not have a free-will that thwarts God's plan. God is not weak, like free-will philosophy proposes.
Humans are not robots. Humans are created beings who are under the Sovereign authority of God the King. Humans are not free. The Bible says we are either slaves to sin or slaves to righteousness. Freedom is not an option. God, by His mercy and through His gracious favor may free a person from slavery to sin, but the person is then made a slave to righteousness. As Paul says, we are bond-slaves to Christ Jesus.
RP, you fight desperately against the bit of God's amazing grace. You are still a slave to sin.