Help with changing the Gorgias LIVE CHAT widget button

[DuvetGuy]

Hi,

I are currently using GORGIAS live chat service on our Shopify website and this is the default live chat widget button. (round button -see attached image)

I want to change it to this (Chat with us - see attached image)

They provided the steps on how to do it: https://docs.gorgias.com/gorgias-chat/advanced-customization-new-chat#replace_the_chat_widget_button 

But I don't know where this code goes and where do I include my preferred button image file?

my shopify store is Qbedding.com

[wowhome]

Hya, I see you managed to make that change to a 'chat with us' button

I want to do the same. May I ask how you did it?

thanks