I cannot get hold of Meili Logistics

I have a HUGE problem. I am waiting for a package ordered from AliExpress. It was shipped and is now with SA customs. The shipping company is Speedaf/Meili Logistics. I received a proforma invoice from Meili Logistics which I paid the customs duty per ABSA ATM and I have the payslip as proof that I paid. Now I get an email reminder everyday to pay the customs duty. On the reminder email is Meili logistics 2 phone numbers. When I call these numbers I go on voicemail. I left several messages to which they did not respond. I sent several emails to them but got no response. I also phoned their landline number and got only voicemail. I took the matter to the AliExpress seller: Shop***Store but so far got nowhere with them. I suspect a ****, maybe the seller or the shipping company, or both. Aliexpress had a good chat helpline in the past, but they changed it to a user unfriendly helpline and I got no further with them. I sent an email to ***, but its the wrong email address according to the email I got back from them. So now I'm completely stranded. Maybe you can motivate them to call me.