The tracking update says waiting for customer fees payment, but my receiver in China cannot pay or doesn't have a link to pay. Can I add their phone number to the order so they can pay the taxes? They do not have any information to pay the taxes. How can we get this sorted?

my package is at the customs but i got no email or message that i need to pay but at my tracking it says i need to pay so where do i find where i need to pay?

Hi, hope you are well. I have sent a package, tracking number RN871473460GB sent from the UK to Beijing, that says in the current status user is required to pay tax for this parcel. I have not received any email informing me how to pay this, could you let me know what I should do or if there is any link I could use to pay for this?
Thanks,
Yunqi