Then you don't believe that God has preserved the basic integrity of His Word?
Of course God preserves His Word - THROUGH the Church... WHO is the pillar and foundation of the truth? Who did Jesus promise to be with for all time? WHO did Jesus say that the Spirit of truth would be sent to? Yes, the Church. God protects His Word through the Church, which keeps it as a treasure, a "deposit", which includes both the written and oral teachings of the Apostles.
Regards