I got warned for not using the template, yet my character is still wearing the clothes, I'm confused. do I just keep wearing them and not upload any more? or do I have to delete them? really need admins to reply soon.

Keep it on

tl;dr of your "ban", you tried to upload clothing that didn't use the brick hill template (https://www.brick-hill.com/images/shop/template.png)

this usually happens to new clothing creators, who decide it'd be wise to upload roblox templates. the brick hill ones wrap differently than the roblox ones, which result in odd confusions where the clothing will be all mangled (see https://www.brick-hill.com/shop/148612/ for an example)

warnings mean practically nothing, and they're more of just a message from moderators telling you not to do something. shrug it off and learn from your mistakes i guess