I have a Samsung SGH. I have a Samsung SGH A707 Sync phone. I entered these exact digits into my

Question

I have a Samsung SGH A707 Sync phone. I entered these exact digits into my phone ( just playing around with it) *2767*3855# and the phone reset itself and everything I had purchased over the internet is now GONE! Even a handful of my important phone #'s.. Is there a way to undo this catastrophe?