Hello Pasadinhas, and welcome to Seven Forums.
While you have them set to "Never combine" to be ungrouped, you could use the tutorial below to change the taskbar button width size to a smaller number as a workaround to shrink the width of the button until the text does not show. You may need to experiment with the size number until you get it the way you like though.
Taskbar - Change Icon Button Width Size
Hope this helps,