Sorry to hear about that, but we haven’t received such a complaint yet regarding Products Variations and Attributes getting deleted just by activating WoodMart Theme.
Could you please elaborate your issue more with some helpful Screenshots and please also share your Site’s WP-ADMIN Login details in the Private Content field so that we can further check and assist you accordingly.
Sorry to say but you forgot to add the Username in your shared Login details. We tried admin but it didn’t work out. Could you please share valid & complete WP-ADMIN Login details so that we can proceed further in this regard and assist you accordingly.