This speaks of a canceled debt. Whenever a debt was canceled, retribution made, or the price paid, the word aphesis was used. This refers to the legal process of going to court to adopt a child. This term refers to purchasing a prisoner for the purpose of setting him free. All those terms are different facets of the magnificent diamond of the doctrine of salvation.
Redemption is just one facet of our salvation.
We are acceptable to God because we have been made one with Christ through faith. In Him that we are made acceptable and given redemption. Our acceptance God gives His abundant riches to Christ, and because we are in Christ, we are recipients as well. Christ is accepted by the Father and we are accepted because of our relationship to His Son. God extends His grace to us because we are in Christ.