Changes not being reflected after impex import when done through Java code

I've written impexes which use Java code. I ran them in HAC. They were imported successfully, but changes are not being reflected which were made through the code. Can someone please tell what needs to be done in order to reflect those changes? The impexes used are:

$contentCatalog=apparel-ukContentCatalog 
$contentCV=catalogVersion(CatalogVersion.catalog(Catalog.id[default=$contentCatalog]),CatalogVersion.version[default=Staged])[default=$contentCatalog:Staged] 
$picture = media(code,$contentCV)

INSERT_UPDATE BannerComponent;$contentCV[unique=true];uid[unique=true];name;&componentRef;urlLink;
;;myBannerComp;My Banner Component;myBannerComp;/;


UPDATE BannerComponent;uid[unique=true];$contentCV[unique=true];$picture[lang=en];headline[lang=en];content[lang=en];
#%xyzService = de.hybris.platform.core.Registry.getApplicationContext().getBean("xyzService");
#%xyz=xyzService.findXyzByCode("D100");
;myBannerComp;
#%xyz.getPhoto();
#%xyz.getName();
#%xyz.getDescription();

The above impex loads successfully in HAC, but when I check in the backoffice, changes made through code are not found.

Solution

Please try below impex.

$contentCatalog=apparel-ukContentCatalog 
$contentCV=catalogVersion(CatalogVersion.catalog(Catalog.id[default=$contentCatalog]),CatalogVersion.version[default=Staged])[default=$contentCatalog:Staged] 
$picture = media(code,$contentCV)

INSERT_UPDATE BannerComponent;$contentCV[unique=true];uid[unique=true];name;&componentRef;urlLink;
;;myBannerComp;My Banner Component;myBannerComp;/;


UPDATE BannerComponent;uid[unique=true];$contentCV[unique=true];$picture[lang=en];headline[lang=en];content[lang=en];
"#% beforeEach: 

de.hybris.platform.servicelayer.<package>.xyzService service = de.hybris.platform.core.Registry.getApplicationContext().getBean(""xyzService"");;
try 
{
    <CustomModel> xyz=xyzService.findXyzByCode("D100");
    line.put(new Integer(3), xyz.getPhoto());
    line.put(new Integer(4), xyz.getName();
    line.put(new Integer(5), xyz.getDescription();
    
} 
catch (Exception ex) {}
";
;myBannerComp;