I am VERY disappointed in T-Mobile's customer service representatives and their lack of knowledge and usefulness. I had an invalid call on October 29, 2008. It was two 3 hour calls back to back so, it charged it roughly about $52. I had around $200 on October 28th and now I have around $2, I don’t make calls frequently. I called on that same day and spoke to a representative who said I was going to receive the credit-back within 30 minutes. Thinking that T-Mobile had great customer service, I believed him and didn't check my... read full review »