WHMCS → My Services → View Details → Upgrade/Downgrade. Select a new plan; charges adjust proratably.
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How do I view/purchase invoices?
In WHMCS Client Area: Billing → My Invoices. Select an invoice and click Pay.
Can I change payment methods?
Yes—WHMCS → My Details → Payment Methods → Add/Edit.
What if my payment fails?
Review your payment method (card expiration, sufficient funds). WHMCS auto-retries twice. Contact...
How do I request a refund?
Submit a support ticket in WHMCS. Refunds are handled case by case, but we'll review within 3...
