Does a divorce take effect if a husband prevents his wife from using social media, and she complains that he told her: "If you use it, then you are divorced," and she confirmed that he said "yes" while laughing when she asked him about it, then he denied it?

The fundamental principle is that the marriage remains, and this is a certainty that cannot be removed except by a certainty of equal strength. Doubt does not affect it. Marital inviolability remains in effect unless the opposite is proven. Therefore, whoever doubts their divorce is not bound by its ruling, because the marriage is established by certainty and cannot be annulled by doubt.