Paying on a debt (but not the one that I keep finding)

[Celeste]

I'm looking for a song that I've only heard twice. I've somehow managed to memorize the chorus after just hearing the song once, but I can't find it anywhere or find anyone that knows it. The chorus is as follows:

I'm paying on a debt
A debt I'll always owe
My Jesus went to Calvary
I don't have to go
From the thorny crown
the blood streamed down
washed my sins away
Now I'm paying on a debt
A debt I can't repay

Help! I instantly fell in love with this song & desperately want a copy of it. Thanks!