Were these apps preinstalled on your device when you purchased it? If so, then usually it's not possible to uninstall them and only disable them. Usually, greyed out apps indicate they have already been disabled. Therefore, look for these apps in Settings>apps. Tap the 'sort by' icon and toggle 'disabled'. (See screenshots). Do you see them listed?
The only thing I can suggest is a factory reset then during set up untick these recommendations when they come up.......I know it's a pain in the ***** but you must have accepted them on initial setup somehow.........I have a sim free phone but because I have an o2 sim it gives you these recommended apps on set up......I just unticked them.