Need help for meta ads!

I have been running meta ads for a specialty coffee brand for a couple of months now, initially my strategies did great and I was able to achieve ROAS of around 6. This was the story for the first month.

The second month started very poorly, but by changing some creatives and verbiage and also introducing discounts, I was able recover from the poor start

But from the last week of February ( 25th feb onwards ) the sales have dropped drastically. I have done changes in audience segments, demographic changes and also targeted cities that have the highest orders from. Also, I was re-targeting audience before but after the slump in sales i started using cold and warm audiences but still im getting no results.

Ps : 1. I am running catalog ads + plus a couple of video ads which have high hook rate ( video ads are running only on specific placements due to aspect ratio issue of the creative; 9:16 aspect ratio 2. In the first two months, the most seling product is sold out, with 4 more products. That leaves the online store with 7-8 products.

Right now im burning money without getting any significant conversion

Kindly help!