Uniview 5mp 2.8mm fixed bullet camera

I purchased a cctv camera uniview 5mp 2.8mm on the 25th march 2024. I received it about 2 weeks later unfortunately it did not work or was not compatible with my hilook dvr so they collected. After a week I spoke to Happy Mamphaga who i have been going back and forth with stating courier lost camera. I requested a swop for a different camera after 2 weeks I get a email no stock. I have requested a refund today is 3rd May 2024 I have still not received it. I then get a email 2 days ago with a video showing camera is working I told happy I have requested a refund it is almost 2 months I am waiting for my money I have still no response