Very disappointed

I purchased two pairs of sneakers, which was delivered on the 30th December 2024. I immediately noticed that the one pair was the wrong size and emailed them to schedule a return/exchange. On the 2nd January 2025 I followed up as a courier had not collected the item yet. On the 6th January the courier finally collected it. I’ve been following up every few days since then with this company and there’s no updates or acknowledgement of my emails. I even asked for the tracking number so I can monitor the delivery myself but received no response. I’m really disappointed and wish I’d spent my money somewhere else.