Lady gaga applied to register the "Lady gaga" trademark in 2011, but the (Trademark) Intellectual Property Office did not approve it. Lady Gaga was dissatisfied with this decision and applied again but was rejected, so she filed an appeal in June this year.
Detailed explanation of dissatisfaction with the decision of the administrative office: dissatisfaction: disapproval, dissatisfaction
dissatisfaction with the decision of the administrative office The act of applying for re-examination if you don’t agree with it
出ける:Withdraw
出けられる:Return
ため:Because, because