Lied to about promotion

HI all - I got my phone - went in and the gal in front of her manager, and another and my husband - checked and said that my phone qualified for the free 800 phone with 128gb. I asked about the difference for having 250gb - and was told it would be about 100 0 $4.00 a month for 24 month as I couldn't pay upfront. So our bill should only be 70+4+ for 74 a month. I traded in my iphone as well and got a $155.00 credit.  I asked three times about the final cost  - being told the same.  Went in to surgery out of live for a while recovering. Noticed a service credit for Nov and Dec. - on autopay - not thinking anything is wrong. Until I got my bill for Jan - it's up to 98.00 dollars now - WHAT.  Plus it looks like my 155.00 credit didn't go very far…. I went to T Mobile tonight to speak with the rep - the person who handled my transaction was not there but apparently the asst manager. The rep I talked to tonight who apparent worked a different store during Oct - said it was for the Magenta MAX.  I told him that I was told - that my plan qualified…. I wouldn't have gone through with it. He took my info, gave me the manager name - and said they will call me Monday.  We will see. I decided to check and see if anyone else had a off experience - I couldn't get the free Apple TV as I didn't have.the MAx plan but could get the iphone.  I am not feeling the love. To be continued.