Well, the only way you will accept which is the correct way of performing salat, zakat, hajj, fasting is if you sincerely want to know the truth and believe GOD. You need to verify the math miracle of the QUran and accept GOD’s assertions in Quran 74:31 that ‘19’ will confirm the Quran is of Divine origin which is why it is called 'One of the great miracles (Quran 74:35). The moment you realize the truth that the math miracle is true and ‘confirms’ the Quran and, by default, all previous scriptures (as they are mentioned in Quran), you will accept that whomever is blessed with ‘confirming’ the Quran is the messenger GOD speaks of in 3:81 that will purify the religion of Islam. Remember, the people of the scripture did not dispute until AFTER THE PROOF of the Quran came to them (Quran 98:1-4).
Here isanother irrefutable proof of Quran
Peace
submitmj