url : www.perfumexnow.com
discounts are automatically being applied at checkout even when its a manual code.
I tried everything. need guidance
Disable automatic discounts in your admin one by one until it stops.
If you have discount apps same thing.
Try your site in an incognito window, or disable your adblockers you may not be seeing all the doodads customers are seeing , there’s at least one that adds things to the cart.
Otherwise you need to drastically improve the detail in your problem statement.
Top of which provide actual product urls for replicating the issue, not just the arbitrary store url.