Hi,
you can select two font icons when you go to Ajustes / Drag and Drop Shortcodes and then scroll down to the end to select which font you want to use.
Also, the problem is
[Icon_dd name = 'phonealt' size = '30px' color = '# ddd' padding = '20px' background = '# 143991'] [/ icon_dd] January
you can see that you have Icon_dd, but there you must begin word with i, like this icon_dd.
If you want to use for example star icon in FontAwesome Icons don’t forget to use prefix fa-.
Same for WebHostingHubGlyphs Icons.
I hope this help you.
Kind regards