T-Mobile USA overcharge, impolite, hidden fees: Livingston, New Jersey

In June 2009, I wanted a $29.99 plan on my phone since I only use it for emergencies. In order to do so, I apparently needed to have my phone on a "$39.99 plan for 3 months". Then, the retailer would "change it back to the $29.99 plan, and I would get my $30 ($10 for each month) back."

3 months later, she didn't change my plan, even though I went to her a bunch of weekends to ask about it. Now it's February 2010, and she FINALLY changed my plan to the $29.99, after much calling and visiting.

Instead of giving me back 8 months worth of $10 (so that's $80), she says that there is a "$30 service fee" to change my plan from $39.99 to $29.99. In the past EIGHT months, she had NEVER ever said anything about there being a service fee when changing plans.

 In all, I've lost $80 + $30 = $110, so far, plus extra taxes and charges.