No refund after more than a month

Sent an email on 26th August asking for an Oppi Koppi refund as they changed the event date and I was unable to make the new one. Received a reply on 2 September asking me to fill out a form which I did the same day.

After multiple emails with no reply, I called them on 21 September after which they rep**** by email saying they are having trouble refunding my card and can I give them banking details to refund that day. No payment was made. A week later I emailed them again and they gave the same excuse about the card and I provided banking details again.

It's now the 8th of October and I still haven't received my refund or any reply to my last email I sent days ago.