If you need help with anything related to the Vizzy Guitar web app, please feel free to contact me.
Damon [at] VizzyGuitar [dot] com.
I check that email fairly regularly and will be able to reply back to you in a responsible time depending on demand.
If you are reporting a bug, please include as much information as possible so that I'm able to recreate the issue. Info should include your email, the song you were trying to lookup, and a detailed description of what went wrong.
You can also contact us via our social media channels. Links are found in the footer of every page.