Reduce unclassified taxa

I tried Greengenes, it gave me completely different taxa results. V4 primer-trained classifier was worse so I just used the pre-trained classifiers from QIIME2 website. I was able to remove Eukaryota as well as Unclassified but I can’t seem to be able to get rid of D-0-Bacteria;-;-;-;-;-. I tried different methods. None of them worked. Any hints?