Wrong delivery of pair 1 and non delivery of pair 2

I ordered 2 pairs of sneakers on 4 October 2023. 12 October 2023 they delivered 1 pair however the size was wrong. I kept on complaining about the size and after ignoring my enquiries for a long time they ended up saying I can return the order at my own cost. I ended up giving up. Now the 2nd pair has not been delivered since 4 October 2023. When I enquire they do not respond. I enquired multiple times on both WhatsApp and email and have not received any response.