Buffalo Logistic double charge on duties paid

I have tried multiple times to get a refund from Buffalo Logistics for 2 payments for duties for incoming goods, that we're pain but they say they never received it. I purchased from Temu. I have emailed their support (***), spoken and emailed a guy called Christopher (***) he is supposed to be supervisor (but he also doesn't care about the customer), spoken to Dimakatso and Michelle at their call centre, I have emailed their refund department (***). I have sent them the proof of payments for both payments of duties. They have promised multiple times to contact me back, but they never do. But they never get back to me, they have ****** this money and no one responds to any sort of contact.