Grabitall poor or no service!!

I purchased Polaroid True wireless earbuds from Grabitall 04/11/2020. These items were faulty and did not want to pair. Escalated the issue to Grabitall and arrangements were made to collect and deliver my replacement at the same time when the faulty items were collected. 16 days ago the faulty items were collected and still no replacement has been sent for this item bought and paid for. I have been sending daily mails asking when the repolacement will be sent to me but still no response on any of my requests.

There is no contact number for this business and I have sent mails to all the available email adresses that I can find, but no response from Grabitall.

What do you need to do to get any response from Grabitall to replace or refund the purchase that I have made?