German Dividend Tax XTB

Hello community, I'm an non-Germany based EU citizen (and tax resident in my country) and I would like to buy certain German stocks via XTB. My country has a double taxation treaty with Germany. I understand that for those stocks, the German government withholds 26.375% dividend taxes at the source. Is there anyway I can get a rebate on those dividends from the German government ? Do I still have to pay dividend taxes in my country ? Has anyone been in a similar situation before ? How did it wor