Wrong billing for new plan

Im very disappointed and feel unappreciated the way I been treated. I have been with you for years and still get treated badly.

I renewed my plan and upon checking my bill is more then what I was expecting. 
I have talked to 5 different agents and none of them have helped me in anyway. If anything they’re just trying to get more money. They all keep giving me different prices and excuses. At the end they ended up doing the new plan myself but is still shows more then what’s I was told. I have screenshots and email order confirmation of the new plan which it should be $100.82 and not  $152.62