Help HELP - Messaging Issue on Samsung S3 mini

I had my Samsung Galaxy S3 mini last March this year and so far the phone has been okay, until recently. The messaging issue is very frustrating for me. There is this one thread in my inbox that just slows down the phone. When I reply on the thread messaging will stop working thus, not allowing me to use messaging at all. I just did a hard reset on the Phone last month so doing the same thing might be unacceptable. Tried to google online and found no answer, they seem to have the same problem.

Steps i took to resolve the issue:

1. Delete thread - Fail
2. Force Stop / Disable app - Fail
3. Install third-party apps - Fail

Any suggestions are welcome.

Desperate,
yoshified
.