Hello,
Yes, contacting the support again is probably your best bet.
But I must admit that it takes a lot of patience. I originally received my faulty L5 on January 27th. I sent it back, and it came back repaired on … May 18.
Note : this delay is not representative, because I voluntarily waited for the reopening of the facility in Germany at the end of March not to send it to the USA. In fact, the repair itself took about a month and a half. The given reason was : "The issue was hardware related and I was told that we had to replace the display and connectors."
My advice is therefore to be polite and patient, to respect the instructions indicated in How to properly send emails to Purism, but also to contact support regularly, say every 15 days, to find out the status of the repair (and to avoid that your request ends up in > /dev/null 
).
My main contact at the support was João Azevedo, who always answered me kindly.
Good luck to you
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