How do I wipe phone if it won't turn on?

I woke up this morning and my phone just won't turn on. Everytime I do the battery pull, a red LED light turns on for about 30 seconds, and the screen remains black. I called T-Mobile and Blackberry and they told me that I should have it replaced since I wouldn't want to get stuck with a defective phone. I've had the phone for 8 days.

Anyhow, my question is how do I wipe the phone completely if the phone won't turn on? I have a lot of important stuff saved on my phone like my bank account #s and my TD Ameritrade and Fidelity log ins.

Please help. I'm going to my T-Mobile store in a couple of hours.

EG

How-to wipe with JL_Cmder

Use the search function!