Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ. (Galatians 3:16)
So, you do not believe this scripture? That the promised seed is Jesus Christ?
The New Covenant is detailed in Deut. 29:4; 30:6; Isa. 59:2021; 61:89; Jer. 31:3140; 32:3740; 50:45; Ezek. 11:1920; 16:6063; 34:2526; 36:2432; 37:2128; Zech. 9:11; 12:1014; Heb. 8:1-13; 10:15-18.
Can you tell me in which of those Scriptures the Church is mentioned?