Don't go CC Dispute road. Only if you paid with Amex!

LH declined mine falsely. They just made some irrelevant BS up about denied boarding when I cancelled for a refund since all flights to Mainland China could be cancelled. Go to court if you have the option.
LH still owes me money and confirm I will get them, but not when. Could take to end of the year she said the 12th time I called.

So, you have no choice but to lend LH money for what might be a year. LH owes me like 2.500€ in total.
But after that you can sue (but begin with contacting LH about it) them for your interest (I know people who did and got like 3-600€ money/voucher)

Well, I am never flying LH again unless it's impossible and the only option.
I might not be their best customer but at least I spend 10.000€ on airfares every year at LH It's something and I know some people who will avoid LH as well in the nearest future.