BlackBerry Pearl 8100

I have a Blackberry Pearl 8100 that is eleven weeks old.
For the past 6 days it has been giving blank screens, and now this happens for several hours each day.
My old wireless, a Nokia, lasted for several years with no problems!
All that the Blackberry offers is very impressive, but it is made to last only a few months.
The majority of my calls are made on a land phone in my office.
In my work there is no need for the camera, or music features, I need a dependable cell phone for contacts when I am not in my office.
The problem:
After a few weeks of use the screen started going blank.
After doing a search on the Internet, I discovered that many people are complaining about this very same problem, some are calling this a white screen.
I called BB Tech Support, they asked me to remove the battery, I did that, several times. Still a white screen.
They said they would replace it and that technicians would check it before sending it.
Well, they sent me a replacement, and made me pay $25 for shipping fees.
And to put the icing on the cake ..... they sent a refurbished one!!
I paid for a new phone and I get a refurbished instead!
If the other Blackberry phone broke down after a few weeks of use should I believe that the refurbished one is reliable?
RIM has built an impressive advertising campaign for a device that has defective materials with a very short life span.
A lot of time was wasted trying to solve the cell phone issue. The question is, how long will the refurbished one last.