Worst customer service

So I did a trial on home internet lite which didnt work in my area so i returned it within the grace period. When it came time to pay my phone bill they forced me to pay $65 for it but said "Refunded to you the following month" So I paid it to move forward trusting Tmobile.. Now im being told that I been declined to get my money back???!!!!!  

Spoke with a lot of those representatives and always promised to be taken care of "I got your back" "I will take care of you".. At this moment in time they are stealing money from me and if anyone is a lawyer on here I would like some advice..  I been with them since 2016 and this is by far the worst experience i have ever had. False promises, lies, stealing, misleading..  I will be ending plans with tmobile. I have never been so mad in my life…. plus only for $65 too which is nothing but the fact is to decline money back that is mine and making promises and not following through is something that is disgusting…...