If the trinitarian formula is the correct way to baptize people, then why didn't the church in Acts (our examples) do it the correct way? The fact is as I stated the correct biblical way is to Baptize in the name of Jesus. If you can show other wise do it. If not the accept what the scripture teaches us to be true.
Actually, there are no recorded accounts anywhere in the scriptures of what the apostles actually said when they baptised. There are no records of any of the apostles actually saying " I baptise you in the name of Jesus". If there were then you'd have much more proof to back up your claims. Because most bible commentaries I've read say to baptise in the name of Jesus means to baptise in His authority. Or as Slepsog mentioned, perhaps they used no particular formula at all.
Here's just some quick commentaries from e-sword:
Re: Acts 2:38, Gill commentary (my own emphasis in italics)
in the name of Jesus Christ; not to the exclusion of the Father, and of the Spirit, in whose name also this ordinance is to be administered, Mat_28:19 but the name of Jesus Christ is particularly mentioned, because of these Jews, who had before rejected and denied him as the Messiah; but now, upon their repentance and faith, they are to be baptized in his name, by his authority, according to his command; professing their faith in him, devoting themselves to him, and calling on his name. The end for which this was to be submitted to, is,
People's New Testament commentary:
In the name of Jesus Christ. "Upon the name" (Revised Version). Upon the ground of the name. In submission to the authority of Jesus Christ.
Barnes commentary:
In the name of Jesus Christ - Not εἰς eis, into, but ἐπί epi, upon. The usual form of baptism is into the name of the Father, etc. - εἰς eis. Here it does not mean to be baptized by the authority of Jesus Christ, but it means to be baptized for him and his service; to be consecrated in this way, and by this public profession, to him and to his cause. The expression is literally upon the name of Jesus Christ: that is, as the foundation of the baptism, or as that on which its propriety rested or was based. In other words, it is with an acknowledgment of him in that act as being what his name imports the Sinner