Last week after the "change of algorithm event", I noticed that my website stopped receiving visitors, then I typed the domain name in Google to see if it was indexed and it was not anymore. My website is using a IDN, (Internationalized Domain Name) in Spanish, and is a small website with only 5 pages, I was expecting to test the performance of this type of domain names, and everything was going quite well, at the time of the disappearance it was having around 900-1000 uniques every month, after 4 months.

I have checked every guideline of Google and I'm 100% positive that I haven't done anything wrong, the only thing I have detected is that a company called Volantis has copied the home page of my site for mobile devices and now instead of my website you find theirs instead.

Could this be the cause of my problems?

this is my web site: piñata.com this is the punycode version of the domain name: xn--piata-pta.com

and this is the duplicated content of Volantis: tc2.volantis.com/vgt/xn--piata-pta.com