Sorry I changed over from ATT

I was with ATT for over 20 years. Recently, a couple of family members changed over to TMobile.  So I thought why not.  But from Day 1 it has been a nightmare.  Besides the fact that there customer service agents are taught to never put a manager on the phone,  Now I have to deal with these phone issues every single month (several times a month).  They never price locked.   No matter what they told me.  I was told that I would receive a plan for 60 dollars a month for 2 lines.  The first couple of months, I received a bill for 4 phones lines and never could get that off no matter how many reps I spoke to.  To appease me they handed me a 20 dollar credit off a 135 dollar bill.So far, since day one I have over paid probably about 200 dollars, and that's alot to say since I've only been with them for about 3 months.  Then I put an international plan on my phone for an extra 15 dollars.  They never added that on until after I finished the calls. So I got charged for the international plan and the phone calls too.  Then I was told that the bill would be fixed oh about 6 different times back to 60 dollars.  It never was.  No matter who I spoke to.  It seemed that I was wasting their time and there is no loyalty department besides getting a frikin burger on Tuesday for free with purchase.  The other way I got tricked which I think maybe illegal not sure checking into it. That even if you cancel you are still charged for the remainder of the month.  That means if you cancel on the beginning of your monthly cycle, then you are still charged for the remainder.  No credit refund no prorating. I want a department that cares what i am saying, listen and can fix the dang problem.  Now I am locked into this expensive getting this phone with them.  But no matter what I am reaching out to an attorney because I know that I am not the only one going through this issue.  I also had to record all the conversations because I didn't belive them at any point after the initial contact.  I am so confused how you can tell a customer that this is their plan and then go and charge them an additonal 50 bucks each month as though they have many more lines.