broken after 6 snorkelling trips

Have these fins bought exactly 1 month ago and today on 31 day is a fin blade to 6 cm length dawned about 4 cm above the foot part. Now stands before the same from the 2.Flosse. Did so only 6 snorkelling trips. Exchange is no longer as 30 days around and I am still abroad.
If I ever see that money again, I do not, but will try.
Especially the blue fins seem to be a very brittle Plasteart. One can actually already see the new blue flippers Materialeinkerbungen where they break later.
Property me today here in a diving shop viewed these fins. The transparent fins seem to be made more flexible material better?
So Hande AWAY FROM THE BLUE CRESSI MODEL !!