First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :-).
I have visited your website and your logo is working absolutely fine on my end. Please disable server caching, deactivate cache plugin, clear browser cache and check back.
You need to open your SVG icons file with some editor like Sublime Text or default system text editor and add height and width attributes to your <svg> tag like it is shown on the screenshot.