Why can't I get 3 line magenta for $105?

The website clearly says I can, but me and my wife are 55+ but I visited a local store twice and called today also, but was told I could not get the $105 for 3 lines on a 55+ magenta! but clearly the website says I could! 

1. Planes de telefonía celular para adultos mayores con descuento Unlimited 55+ | T-Mobile  it says here one can get 3 lines
2. Here it says both new and old customers can get it. but at the store I was told only 2 lines are allowed and when I said a friend has signed up it I was told only for new customers!  and today another friend signed up the same thing!  “

    

   ¿Quién es elegible para Magenta Unlimited 55 o Magenta MAX Unlimited 55?

   Todos los clientes del servicio pospagado de T-Mobile actuales y nuevos que sean mayores de 55 años son elegibles. Para recibir este descuento, se requiere documento que certifique la edad. Los clientes nuevos pueden inscribirse en su tienda  T-Mobile  local con una identificación emitida por el gobierno. Los clientes existentes pueden inscribirse llamando al 1-800-T-Mobile o visitando una tienda local.

    

   ¿Puedo tener más de 2 líneas con mi plan Magenta Unlimited 55+?

   ¡Sí! Los clientes que tienen un plan Magenta Unlimited 55+ o Magenta MAX Unlimited 55+ pueden tener hasta 4 líneas de voz en su cuenta. On the Magenta Unlimited 55+ plan, 3rd and 4th lines are $35 each line per month with Auto Pay. On the Magenta MAX Unlimited 55+ plan, 3rd and 4th lines are $40 each line per month with Auto Pay. Customers can add additional lines by calling 1-800-T-Mobile o visitando una tienda local.

so what I am missing! how can others can get it but I was told no? I am currently paying $124 for 4 lines but I do not use the fourth line. So I would rather pay $105 for 3 lines + free netflix.

why do they give me a runaround when the web says clearly there is one such a thing: 55+ magenta for $105 total (including taxes and fees0 for 3 lines?   (do they have my age wrong?).