The link you followed will bring you to this page:

https://fiberevolution.beactive.it/smartvoip-flat-servizio-di-telefonia-da-abbinare-alla-tua-adsl-2000-minuti-al-mese-per-telefonare-con-internet-verso-fissi-e-mobili-gratis-a-soli-1250-e-mese-iva-esc/