This review is not against this store it is for people who use T-mobile and find out a service was added to your plan that you had no idea it was added. In my case it was $15 dollars a month fee for adding international calling to my plan and I have never had a need to have this service in the 17 years l have been a loyal customer with this company. Thy say I added this to my plan through an app. I have never used an app for T- mobile in my life but I have no way to prove that I did not do this and they say they have no way to prove I did this. They say they will send me proof that I did this but I have never had the app on my phone, ever. Yes they say they will credit me for three previous months but not back to the day it was added to my bill in 2014. I guess we all should pay closer attention to our bills and not expect the company to tell us every year I call in to ask what I can do to lower my bill and this item was never brought up by customer service on any calls when I asked. My advice is to call T-mobile every six months and ask what they are charging every month line by line so you know what you are paying for and make sure they didn't add another service to your bill you had no idea was added to your bill. I love T-mobile so I never expected this to happen in the 17 YEARS I have been a customer. I guess my trust with them has diminished and I will need to pay closer attention to my bills.