Samsonite telescope handle jammed

The telescopic handle on my wife's Samsonite carry-on jammed open in the
extended position last week in the middle of a business trip, I've just
spent the last few hours trying to fix it without success.
The lining material unzips to reveal the base of the telescopic tubes
inside the case, to get any further I had to remove the handle and
several screws to reveal the problem - in the extended position two
locking pins pop out of the sides of the tubes inside the case, and no
amount of lube, pushing or shuffling gets the mechanism working again.
Any more disassembly means virtually tearing the case to pieces.
This is really frustrating, and it looks like we'll have to get a
replacement, although it's not even two years old. Does anyone have
recommendations? Need a carry-on size with four wheels and separate
sections for documents and clothes. I used to think Samsonite was the
best, but not any longer.