Yes receiving is a work, its something you did. It doesnt matter if the work was enabled to do by the Spirit, that makes it a work of righteousness, and we not saved by works of righteousness Titus 3:5
5 Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
Repentance is a work, if you saved by your act of repentance, you reject Grace salvation. All you doing is showing more and more you reject Grace Salvation