Debit my account twice and now wont refund

I bought off Shein. I paid customs, but Buffalo deducted twice. Charlotte Maluane doesn't seem to know how to read as she keeps emailing me something off a script. Her manager Bianca Schoeman also doesn't respond even though she is copied in. if you wats app they don't reply , definitely not quirk response , I try call I get cut off. no way of talking to anyone Useless courier company, bad communication