Rashi on Genesis
ותחלף את משכרתי AND THOU HAST CHANGED MY HIRE — You have altered the agreement regarding my hire between us from speckled to spotted and from streaked to grisled.
Kli Yakar on Genesis
That I have been in your house. Actually, he was only in Lavan’s house for a month (29:14). The rest of the time he was in the field and in his tents. However, that month was so unpleasant that it seemed as if he spent the entire twenty years there.
Sforno on Genesis
ותחלף את משכרתי, by doing so you reversed yourself since it had been you who had determined what my wages should be.