Defects strap

Have this bag given my friend a year ago at Christmas.
Unfortunately, now the strap is pulled out of its socket. I think that a bag has to endure a regular normal use.
They shall protect the notebook and do not pop on the floor.

Yet I give 2 stars because the complaint went very well. They sent us without any problem a replacement bag of the same type (one size larger). Unfortunately had exactly these after a short time the same problem with the belt. Now have the money to get back and my friend gave me banned at this manufacturer nor to buy a bag.

Unfortunately not convincing, too bad.