The blood of Christ redeems (Zechariah 9:11, 11:12-13, Matthew 27:9-10, which refers to Jeremiah 32:7-9, Ephesians 1:7, Colossians 1:14). In chronos, Jesus died on the cross a little over 2,000 years ago. In kairos, however, He was the sacrificial Lamb that was slain before the foundation of the world (Revelation 13:8). So long before you were born, Christ made the conscious decision to be brutalized, scorned, mocked and killed in order to redeem you from sin and sin’s wages, death (Romans 6:23). He bought you with the purchasing power of His blood.
This means that any blood covenant made between you and a gang, a coven or anyone can be broken and that spiritual contract deemed null and void once you accept Christ as your Lord and Savior. His precious blood covers, redeems and purchases your freedom. If you have made a contract with any of these groups or an individual, once you accept Christ in your heart and declare it with your mouth (please see my Self Deliverance post) then you can simply say the following prayer aloud:
Lord Jesus, thank You for freeing me from that bondage. I now declare my past affiliation(s) erased both in the spirit and in the natural. I render any and all contracts null and void. The blood of Jesus has paid for my freedom; it is the escape clause in every contract. I am no longer bound to (state the name of the gang, coven, group or individual). I have been set free by my Lord and Savior, Jesus Christ. May the pact this bloodline has now made with You never be broken. I declare this in complete assurance in the powerful name of Jesus of Nazareth. Amen.

Please, seek the Lord while He may still be found (Isaiah 55:6). I pray this blesses you.