Can't edit home page or delete freshly created sites

Hello guys,

I am unable to modify my home page located on address https://company.sharepoint.com/default.aspx the edit button is just not here. My account is in group with full access. 

Second problem when I open office 365 ->  Share Point -> create web it create new site on address 

https://company.sharepoint.com/sites/NewSite but i am unable to remove the page or even access it. There's no one else who could change my permissions. 

https://company.sharepoint.com/sites/NewSite2 can see, browse, but can't delete (getting page "you don't have permissions but you can ask for. Ok request send and waiting for approval but by who if i was only one who created the page...)

https://company.sharepoint.com/sites/NewSite3 can see, browse and delete 

all without touching permissions 

In both cases when trying to access  https://company.sharepoint.com/default.aspx  or https://company.sharepoint.com/sites/NewSite/default.aspx  I am getting error like "You don't have permissions to open the site from SP Designer"

My account in Office365 was created as admin account, full access... 

Any ideas? Thx