If you approached the Sacrament with a truly contrite heart, you confessed your sins, and you did the penance assigned to you, you have fulfilled all the requirements that rest on you for God to grant you forgiveness of your sins. Remember that every Sacrament we have is a sign of something that happens invisibly, beyond our ability to see, touch or “know” happened. Part of this particular Sacrament is the reassurance of hearing the Priest tell you, acting in persona Christi, that your sins are forgiven. That is for YOUR assurance, it has nothing to do with God forgiving or not forgiving your sins unless the Priest specifically tells you he will not grant you absolution (and that only happens if one of your requirements is not met, i.e.- you aren’t contrite, etc.).
In this case, the Priest used the wrong words from the official text, but he did indicate that you were forgiven those sins. So, translate that from “sign” to “reality” and where do you stand with God?
I think you were forgiven. I think it would be a difficult case to make that you did all that God required of you, then God did not forgive you because the Priest said one word wrong.