Who did Christ select as Apostle & Minister to believers today ?...

Who did Christ select as Apostle & Minister to believers today ? Paul
Acts 9:10-15, Acts 13:1-3, Gal 2:7-9, Rom 11:13, Rom 15:16.
Can you show the verses where Christ gave the same unique role to Matthew ?
Do Paul & Matthew contradict each other OR do they teach a different audience ?
What did Paul taught is required for a believer today to enter Heaven ?
1 Cor 15:1-4.
What are the conditions ? :-
Eph 2:8-9, Gal 2:16, Rom 3:24-28, Rom 4:5-8, Eph 1:13, Eph 4:30.
Disagree ?
Show the verses.