Shoecover got a hole

Hi everyone! The shoecover is quite new. I used it maybe 5 times and after today’s ride I discovered this hole on the left pair. I’m guessing it’s how I clip in or I don’t know. I’m new at cycling and clipping in isn’t always so smooth 🙂
Anyway, I’d like to ask you people for some tips and advice on how to fix that tear or at least stopping from spreading so much that the shoecover becomes unusable. Also maybe if you have similar experience than to point out what could be the reason for this.
Also, I wrote to Castelli hoping that maybe they’re so generous to accept it under warranty claims and I asked their advice too on how to fix this in case the warranty isn’t valid, which I’m pretty sure isn’t but lately many companies are super generous with warranty.