Buffalo - no reply to emails requesting Duty refund due to duplicate payment

After ordering from Temu in March 2024, I received the standard correspondence from Buffalo International to notify me of the duty to pay. I used the payment link on the website and made payment through my banking app. The payment was processed by my bank, but not captured by the Buffalo website. Thinking that the first payment would be reversed, I did the payment again via the website link and it was successfully captured the second time.

On 25 March 2024 I tried to contact Buffalo via the whatsapp number they advertise to ask how to proceed as the duty had been paid for twice. After many tried to chat with an agent, i never had any sucess.

On 29 march I emailed the contact that was advised by the whatsapp chat bot. I have had no reply to this email.

On 12 April I emailed again to follow up. I have had no reply to that email.

I have tried again on the whatsapp number - I am simply trying to get the refund form that I know i need to request the refund, but there is no one replying to any contact i make.

I have been so impressed with every other aspect of Buffalo's delivery, but this experience has definitely soured the experience and I will rather buy from local retailers and not Temu or Shein after this experience with Buffalo.

Please resolve asap