Veeqo Shipping

All I'm trying to achieve is:
(1) Veeqo to pull inventory levels from Amazon FBA (UK, US, CA) and push them to Shopify.
(2) Veeqo to push orders from Shopify and push to Amazon FBA (UK, US, CA).

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Seeing as Veeqo is owned by Amazon you'd think Veeqo would integrate well but I've had issue after issue.

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Every time I have an issue, Veeqo Support seem to send me on a roller coaster of troubleshooting (having some technical background myself most of the troubleshooting I'm asked to do makes no sense). Eventually the issues get escalated to the technical team but it then takes weeks/months for the issues to get resolved.