Sprint Data Plan Overbilling Internet

I have been a Sprint customer for many years (over 10, believe it or not) but I am finally fed up.  I switched to an Android close to 3 years ago.  Sadly, I didn't notice that Sprint was charging me a $10/mo "premium data add-on charge" despite the fact that I was already paying $69.99 for an "Everything Data" plan that I was told at the Sprint Store would cover everything I needed (after all, "EVERYTHING" is in the title, isn't it?). "Let the buyer beware," I know, but this seems like a classic case of bait and switch.

There's also the fact that Sprint sold me a 4G phone but neglected to tell me (surprise, surprise) that they only offer 3G coverage in my area.  In other words, I paid an extra $100 for phone feature I can't use.  Still, I decided to keep the phone, thinking I'd use the 4G on business trips (though that obviously doesn't negate the questionable sales practice).  Unfortunately, I've learned by comparing my phone to others that my 3G in this area is actually comparatively unreliable, with lots of dropped calls, GPS apps that don't work even where the 3G does, etc.

I should add that I considered getting a different "free" phone with Sprint but was informed that I'd have to re-purchase all the games and apps I've paid for.  Seems a bit unfair.

Finally, after searching through my Inbox AND Spam folder, I noticed that Sprint did not email me a bill for January, then charged me a $4 "late fee." This is not the first time this has happened.  Obviously, that's not nearly as important as the $200+ but still worth addressing as a matter of principle.

I have looked into class action lawsuits and have also contacted the Better Business Bureau (and, of course, Sprint).  I want to be fair, honest, and reasonable about this so if the situation is equitably resolved, I will happily update my report.