Payment link doesn't work - totally unhelpful

I have tried 3 times to pay customs andVAT for a Temu order using the payment link I sent them. The payment is not reflecting, and they apparently cannot check using the reference number that is in the link I was sent.

I have asked how to make the payment in the event their payment portals aren't working. They cannot or will not answer the question.

Thanks to them I have now paid for an order I will never receive.