If the coupons have status REFUND it usually means refund processing is complete and the money has been taken out of the ticket. Although there's a separate status for refund taxes/fees only, I'm not sure if LH uses it or Saudia differentiates it in the display. So REFUND could possibly mean either a full refund or refund taxes/fees only.
You could wait a day or two and check your credit card account for the very low chance that they just processed a full refund today.
If not, call them again, explain what you know with this new information, say you consider contacting CC issuer, see what they say. If not productive, contact CC issuer, tell them the same story and definitely include involuntary flight cancelation documentation as LH may tell them you voluntary canceled a non-refundable ticket and got your taxes back because that is what their system says.
YSK there have been reports of airlines confiscating miles/points or closing mileage accounts in response to a successful chargeback. I'm not sure if there have been reports of LH doing that though, and in any case, it is only a concern if you have a MaM account with active miles.
Let us know how it evolves.