Six days is really not where Fairphone support is yet, I think. A few months back the average response time was around 2-3 months, and since then Fairphone has told in two updates (this one and October update) that they improved, but even when asked directly never published any numbers about how long one waits now - so probably still some time.
You could try the repair portal, not sure, if accessories are handled there, too.
I just checked https://support.fairphone.com/hc/en-us, there is a live chat and I asked Tin to get to a human, and got to the form to enter my name to chat. I think it is there (only 10 more minutes though for today).