Elie, something is amiss here. As Tom says, the concept is a single, worldwide tree with one profile per person, and there is no ownership of any part of it by any of the members. But this site is free -- you would not have been solicited to buy any subscription within WikiTree. And I'm not sure what you mean by being reverted to someone else's page. I don't believe there's any way that entering DNA information could cause any commingling of profile data here. Are you sure you're not somehow getting linked to other site(s) outside WikiTree?
Last point: Since it's all free, it's also pretty low budget, and there's no tech support staff to call. You just do exactly what you did -- post your problem in this forum, and other users will attempt to help you.