Worst customer service team ever.

I've been trying to contact Buffalo for 2 weeks with no avail because I got a message from Shein saying I still needed to pay my customs duty tax which I've paid already. I called them today and after a number of attempts I got through to someone. I can't believe that the assistant was shouting at me over the call then dropped the line. Again my query is still not resolved and I have to keep trying to call them. I guess it will take another 2 weeks to get through to someone again. Their service is appalling and I'm shocked. I am actually in disbelief!!