The seller can say all sorts, this depends if you opened a case and escalated. Did you?
That is the only way to ensure a refund.
If you have done this, then refunds will go back to original payment source, and is not always instant. Paypal fund payment? Back to your Paypal account quite swiftly. Debit card payment? Back to your bank account within 12 days. Credit card payment? Back to that card account, can take up to 30 days to appear there.
