There are little to no providers that are truly undetected who are willing to offer test keys, it's a bad business move unless they're a brand new provider who need reputation. There are undetected cheats, for example: mine - which you can find in my signature. It has been undetected for over a year, and there are other cheats which also have remained undetected for a while but you are simply looking at the wrong ones.
Instead of buying a cheat that has a reasonable price and reputation, people buy cheats which have no reputation and offer daily keys. If you value your account, you'll pay the monthly fee on a good provider, it's very simple.
Im not going to give you a 12hr test but I can go live on discord while your in call using the cheat and showing you I don't get banned. Its called Franxx Apex and its Aimbot and Esp and there are not too many users as of right now. Just dm me on discord and I will go more in depth about it. Zoink#3853