We are very sorry to see that you have concerns over the durability of the tile.
I can confirm that it is porcelain, and so should be incredibly durable. For example, for every mm of thickness, porcelain should last 100 years.
We do always advise letting us know of any problems so that we can quickly identify a solution. I have, however, contacted you personally for some more information to see how we can best assist.
Regards,
Joanna