Worst customer experience ever

Terrible customer service. I have placed my order with SHEIN on 10 Aug. It arrived at SA customs on 15 Aug. It was cleared on 16 Aug. Received on 19 Aug at Buffalo Airport warehouse. My expected delivery date was between 26 to 29 Aug. I called the Buffalo logistics call center on 31 Aug to find out what is the status, then only was I notified that I had to pay tax, without any communication prior to that being sent to me. I received an sms with the details to pay the tax after the call and I paid the tax on 31 Aug. I called again on 2 Sept to find out what is the status and they said it is with customs and I need to provide additional documents via email, again without any prior communication to me about outstanding documents. I provided the required documents on the same day. I also don't understand that the shein apps says it was cleared by customs on 16 Aug. I have been calling the Buffalo call center almost on a daily basis and followed up via email multiple times and I still do not have feedback ito what the hold up is. This is extremely frustrating not to get any feedback even if multiple escalation have taken place as well and not how you should treat your customers.