You might simply delete your browser history and then not click on any more ads from Temu. Many of the ads are targeted toward the user. For instance, several months ago I was looking for lighting fixtures. For weeks after that, nearly every ad that popped up was for a lighting company or selling lights. Last Christmas I was searching for a specific gift and got a bunch of ads from companies selling the same or similar. It's the same with Temu. If you see an ad for Temu, either in one of the Google ads or even in your social media feeds and you click on and view it, that usually only leads to more. Clearing your browser history should help.