I tried, but have not received any response from them. 
Topic summary
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Issue: A merchant cannot issue a partial refund on an order. The system returns the error: “Refund failed! You are not allowed to request refund.”
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Context: Payments are processed via a third-party payment provider (external processor). The error suggests a permission or policy block on initiating refunds through that provider.
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Guidance given: Another participant advised contacting the payment provider directly to resolve the restriction.
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Current status: Unresolved. The merchant has already reached out to the provider but has not received a response.
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Actions/next steps captured in the thread: Follow up with the third-party payment provider’s support. No platform-side fixes, settings changes, or workarounds were identified or agreed upon.
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Resolution: None yet; the outcome depends on the payment provider’s response. No attachments or additional technical details were provided.