Whole header messed up

In addition to the previously reported problem, now my header is completely messed up and I am not able to change it back! In addition, I do not see the mess from the customizer window but only when I type my page address, which is www.brightbraincentre.co.uk Did I make a big mistake choosing your Theme and your Service???? Some help on how to fix this would be much appreciated. _________ I recently purchased the Catch Box Pro Theme but I encounter problems with the font family feature and more importantly, with the size family feature of the version. This is annoying, as these features seem to be either irresponsive or respond in a random fashion. Any ideas how to help this issue are more than welcome. Thanks.