I purchased the Battle of Azeroth and it didn’t came

I bought World of Warcraft Battle of Azeroth yesterday and I don’t know how to run or install it. I tried to set up a new game account but it didn’t work. I would like to have it on one character but so far it shows me that I am still a starter edition and not a Battle of Azeroth edition. I wanted to buy the Battle of Azeroth because I didn’t want to have a 20 lvl limit and a 10 gold limit. I also play with friends and I couldn’t do a group.
Thank you for the advice!

–: JuliusSK :–

Please see my reply to your duplicate post here.