access samsung gleam messaging

So, I have a bit of a strange problem. I typed up a bunch of messages and saved them to my draft folder and then sent them. Somewhere along the line apparently my sent folder got corrupted..There is a text that I originally had saved in my draft folder that is literally permanently stuck in the sent folder. I tried deleting the message/restarting the phone many times, but it wouldn't go away. I then tried locking the message and then unlocking it, but now the message forever has the lock symbol by it. When I click "unlock" the phone says the message is unlocked, but the lock symbol remains. I can't get rid of it. My inbox/sent box also experience random glitches after this happened.

In all, I guess my question is: how can I access the text messaging using a program like QPST? I would like to try and manually remove the message, but I have no idea how to do this, or if it's even possible. Any help is appreciated, thanks in advance

I apologize for the double post, but I wanted to ask a new question about this (without my topic disappearing). Is there anyway I could possibly format my phone's memory and delete everything I have done basically? If there is really no one who has an answer for this problem, can anyone suggest somewhere I can find an answer? Thanks once again

update: I found a way to access a messaging folder on the phone, but all that is there is a bunch of .seg files..which does not seem to have a way to be opened. I decided to click "erase all messages" on my phone, and after doing so (obviously the sent box still says there is 1 message) I checked my messaging folder once again. I found that all folders were now empty except for one which contained a .txt file that reads "Fixede." Once again, if anyone can help me I really appreciate it. And sorry for the double post, I figured an edit would be pointless after all this time.