I don't believe that there are contradictions in the scriptures. What are you going to do with Isaiah 63:11?
I don't believe there are contradictions either.
Once Christ came in the flesh, while with them in human form, He was that same Holy Spirit; that is, the Holy Spirit was manifested in the form of Christ so to speak. It was not until after Christ's sacrifice had completed that He sent the Holy Spirit to spiritually indwell the elect at their becoming born-again.
The verses I quoted to you came from the Bible, not from me. What do you think they mean when they say that Christ (God), would send the Comforter unto them? Please observe that in verse 14:16, Christ said He would send
ANOTHER COMFORTER to them, meaning that, in being God, and in addition to being the Christ,
He at that same time was also the Comforter. Also please observe that in verses 14:26, 15:26 and 16:7, we are informed that He "
WILL SEND" (future tense), which, because He remained to be sent in spiritual form, that Christ at that time already was the Holy Spirit with them. Also, please observe that in 14:18 Christ again tells us that He is the Comforter because He said that "I will come to you".
[Jhn 14:16,18, 26 KJV]
16 And I will pray the Father, and he shall give you
another Comforter, that
he may abide with you for ever; ...
26 But the Comforter, [which is] the Holy Ghost, whom the Father
will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you.
18
I will not leave you comfortless: I will come to you.
[Jhn 15:26 KJV]
26 But when the Comforter is come, whom I
will send unto you from the Father, [even] the Spirit of truth, which proceedeth from the Father, he shall testify of me:
[Jhn 16:7 KJV]
7 Nevertheless I tell you the truth; It is expedient for you that I go away: for if I go not away,
the Comforter will not come unto you; but if I depart,
I will send him unto you.