[Johnngnky]

no I think it was because of my ISP.

That's the first thing you must change, by navigating via a VPN.

Say for instance, somebody used their mobile data, isn't that always a different IP every time it's switched off and on? I swear i read that somewhere. If not then i have no idea where i got that from. Also, even if you're using a VPN wouldn't you need a fresh device to order from due to the information that gets stored?

Thanks mothered for bringing this post back up

As far as I know, a website cannot view your Mac address, however, they can likely contact your ISP/public wifi for your Mac address.

I have seen a freeware Mac changer
(I'm not affiliated with technitium, I have just got good experience from using it. Since it's freeware, use st your own risk)
https://technitium.com/tmac/