Complaint Review: T-Mobile

I am a T-Mobile customer for over 12 years & have not had any big issues with them till now. I was at the T-Mobile store on the 11/21/2016 and I was informed that my account qualified for 4 FREE phones if I change to T-Mobile one plan and get 3 lines (4th will be free) for 120/month - unlimited everything. This sounded too good to be true especially given the fact that I had recently received 2 phones from T-Mobile on my existing lines a short time earlier. I requested that the store make sure that I qualify - the store manager and the sales person assured me that I don't have to worry about this.

I still had difficulty believing them so I made them WRITE this on the receipt and had both of them sign it - I will attach the receipt to this if I can. Few days later I noticed my bill was much higher than 140 that I was promised so I called T-Mobile several times and they told me that I don't have to worry about it, the bill will get reduced as the credits were applied, to 140. I also have recorded these conversations (My dad always told me that if it sounds "too good to be true, it probably is" - so I take my precautions). I am happy to provide recording of these conversations also.

Now I receive a email from customer relation (after I called them again for high bills) that the plan for 140 didn't even start on 11/21 and that it actually started 9 days later but they will be "nice" to me and give me the phones for $99 dollars/phone (400 dollars total). This is unacceptable to me. I have T-Mobile store manager/sales person hand written note that the phones were free and also recorded conversation with customer service that my bill will be 140. Now that I switched my brother and mothers account from ATT to T-Mobile (to use the 4 lines), I am told that I do not qualify. Every time I call T-Mobile, I waste at least 40-60 mins and I've called at least 10 times over last couple of weeks. Please help