It just hit me in the night — they might have automatically disabled the return option because you have the ongoing customer service query. A lot of what happens on VC is automatic, triggered by other actions/status.
I looked for the return button before sending a query though. They need another three working days.
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Here's the latest reply from VC:
Dear ***************
I understand your request.
Regrettably, I cannot provide you with a detailed answer, however, I have forwarded your request to our team.
The team will get back to you in a maximum delay of 3 working days, in order to keep you informed of the evolution of your query.
I thank you for your patience, and remain at your disposal should you have any other inquiries.