Affinity Designs does not deliver

I have inquired about Stickers for my car, and the person who was assisting me agreed that they would be able to deliver the requested designs.They gave me a quote via WhatsApp and i paid, since then there was no communication from Affinity Designs though they keep om advertising their business. I have used the same WhatsApp number to request refund, the messages are just read without response. I still need my refund.