... oh so maybe I should have sent the scanned receipts directly
ok, so i attached scanned receipts (totalling about EUR200 or less) and lost baggage report (with the case ID), and replied courteously asking again for the reimbursement.

About 30 minutes later, I get this reply:

************************************************** ***********
Dear xxxxxx,

Thank you for continue correspondence. (spoiler alert: everything after this was repeated)

We are sorry to hear that you were unable to pick up your baggage in following your trip.

We can imagine how stressful this must have been for you. We sincerely apologize for the delayed delivery of your baggage as well as the associated inconveniences.

Liability for baggage is clearly regulated by law, and we must fulfil certain criteria in order to be able to meet your request for compensation. The passenger must indicate the damage amount and prove it with the help receipts, e.g. sales receipts or credit card receipts. As much as we understand your irritation, we are unable to comply with your request for reimbursement of the expenses for your replacement purchases.

We hope for your understanding that we cannot pay damage compensation under these circumstances. We nevertheless hope to welcome you on board a Lufthansa flight again soon.

Sincerely,
Vaishali Pant

************************************************** *************************************

Anything else I should try?

Or LH just doesn't reimburse for purchase of necessities in the case of luggage delays, and I should stop trying?