Why offer a promotion if you're not going to honor it??

I received a call from xfinity mobile offering me a free promotion of free phones up to 3 lines if I ported my number in. I asked if this was a contract and was told no I asked were there any penalties and fees for canceling since I was not in the market to pay for anything more pertaining to a phone. The customer service agent that called me said there are no contracts or penalty Cancel any time. I poured it in one phone line 1st and the guy said that I needed to call back when I had the information for the 2nd phone line so I called back and in the lady agent told me that the guy that not port the number in as a free promotion. She got her supervisor to apply credits to the phone since it was offered as a free promotion then she activated the 2nd line for the free phone promotion. My daughter lost her phone shortly after registering the phone we didn't have it 2 to 3 weeks and they took her off for the phone then when I called back a couple of weeks later to cancel the 2nd phone they said it was canceled but I still was charged unlimited fees along with the phone fee for over 2 months. I've been dealing with this situation for over 3 months and now they refuse to remove the free phone line for one of my phone lines at the that phone was lost as well both free phones were lost and they removed 1 but they kept another on there saying that I have to pay the fees for it. I did not sign any contract saying I needed to pay fees for a phone and now they're charging me additional money for a phone that should have been free with the promotion but was added in era by one of the agents and credits were applied for that phone so that I would not continue to be charged for a phone that was free. No one has a supervisor refuses to take the call and I cannot get this resolved but if this is not resolved soon I'm gonna contact the BBB Consumer Reporting and the Attorney General. If that's not enough for you guys to take that phone off of my phone plan that I'm going to follow law suit. The guy even offered me a $200 Visa gift card if I kept the phones for 3 months that was a stipulation for getting me to keep the phone's longer and I would have kept the phone's longer had the lines not been lost. I want this fixed immediately! You guys are wrong to take advantage of hard working people.