T-Mobile USA review: deceptive sales on svc, trade-in and rebate

So we switched 5 phones and added 2 new lines. The rep said we could get $700 off a new apple phone X for trading in my sons iphone 8, which was off lease and needed 138 to own. ~$600 for a sumsung 9 (which would have almost paid off her phone $627). I was supposed to get a $400 byod credit, I went and paid my phone off. Representative ended processing the iphone x and samsung 9 phones, right there, before we'd paid Sprint the final bills. They credited ($184.00) for my son's iphone 8, instead of the $700. The rep knew we had to pay the 'to own' amount. Which is why we switched, because he was off-lease and sprint was chargining $30 a month, we had to pay $174.93 to own that device. They credited ($145.00) for my wife's samsung 9, which still was on lease and needed about $627 to pay off to own. Then the rebate form was incorrect, it was going to give us $158 and had a phone number I didn't recognize. I was expecting $1100 and the iphone x to be paid off? We went to back to the store and found out that rep was from another store and had filled in that day. They said the rebate form was incorrect and they'd try re-run info. We spent over 2 hours there on that follow-up evening. T-mobile said, well we you ~$478 or so in the rebate, because they don't stack up. Now, T-Mobile says its too late to get any rebate. So I got ripped off, I paid $900 to sprint that next bill after when we switched. I paid $357 to pay off my samsung 8 phone that day (and kept it), I thought, my son paid $397.18 to T-mobile to completely purchase the iphone X. I paid Sprint $627 for my wife samsung 9, that t-mobile took that day (it was on month 5 of 24 on lease). T-Mobile credited us $300 that day and lied. They screwed up the rebate (both phone and amount) and then said that it was too late to get the rebate.