I can't say for sure about Mosti and this particular wine kit, but sometimes a wine kit is "in the style of" a particular wine or region and may in fact not actually be from that region.
I would contact Mosti and ask them point-blank about where the grapes are from. I am only saying that you need to do a little research.
Regardless, the Renaissance kits are really nice kits (one of my favorites) and I am sure you will enjoy this wine.
If you do ask them, please report back and let us know what they say.