I bought a puffer jacket online on the 11th of August 2025

I bought a puffer jacket online on the 11th of August 2025. After I paid for my item, I realised I use the incorrect email address. I contacted the call center which they could not help and advise that their delivery is usually seven working days, after the seven working days I contacted the store to check if my delivery has arrived but they did not have it so I called the call centre again only to find out that the item was out stock and could not deliver, I was advised to send proof of banking details using my other email address and the refund will reflect in my account after ten working days, this was on the 20th of August, till today I still haven't received my refund and everytime I call to follow up all I get is we will escalate the matter. Still nothing, it's almost a month since the case was open on their side.