Poor service from Avon

Hi. I placed an order and received items on 29 August 2025. However, the items were short delivered and there was no indication on the picking slip of the whereabouts of the remaining items ordered. I sent an enquiry email with evidence of my order items, picking slip etc and I have not received any response ito where my items are. This is ongoing for 6 days including today. They're quick to send out correspondence when payment is a day due but when it comes to support, it certainly falls way short. The service is quite disappointing.