Bad right the 1st insert broken

I've ordered the items to shoot a few photos from the water.
Since the water in my Trunk lake is very turbid and the camera would immediately disappear if they purely flies,
I ordered this Polaroid loop. At the very first use of the seam has solved and my 300 camera would have disappeared almost in the lake (I have just noticed that the part depends only on 2 threads on my arm. Really very poor workmanship and visually poorly sewn!