Note: This article has been updated with lastest available information on February 15th, 2022 at 07:20 am
Positive Grid does not provide a customer service phone number fot the Spark amp. If you have question regarding the Spark amp, they have a chat bot on their support page. Just click on the Support button at the bottom right of the page.
However, best way to contact official Positive Grid Support is by submitting a help request on their website.