I'm confused how you were lied to. If you got an offer letter with the exact amount and structure in which you will be paid, and that is what you got, you weren't lied to. And, unless I'm missing something, them removing 5k from you bonus (paid over 4 years) is worth an extra 5k per year in salary.
And, it's your first week. You think they are going to just go "oh, new guy, take this important account!" Come on now, of course they were making shit up for you to do until you and they are comfortable easing you into actual work with clients.
But, 2 to 3 hour commute? Nope. I wouldn't have even interviewed.