Mercari japan need help with something

Hi guys,

Quick question.

I bought something on Mercari, then cancelled the order and the seller agreed.

The money was taken from my bank account and refunded a couple of days later. However, a few days after that, the amount was charged again, and it’s now been three weeks.

I tried submitting a helpdesk ticket, but I haven’t received any response for about a week and a half. Is there any other way to contact them? Also, the cancelled order no longer shows up in the app.

It was like 40.000 yen, so quite frustrating.

Thanks for your input.