Advertising for Shopify

The customer launched Shopify Dropshipping. When I started the project the site was already ready, the pixel was installed, the events were placed on the site and there was one creative. I suggested to make additional creatives to test them and choose the best. The creator was a video.
In general, everything worked well even with a cold audience, but the customer had to close his store due to the returns (the buyers did not fit the quality of the product).