So I was recommended to use plugins, however I could not figure out how, I've gone through various different file editors, and downloaded the trade extension plugin however I don't know how to actually input the file into VO's app, any assistance would be great.

It should be under Storage>Android>Data>Vendetta>Files>Plugins

You may need to create the "Plugins" folder, if it does not yet exist. Unzip the zip files that contain the folders of plugins you want to use, and copy them into the Plugins folder.