Learn to either trust a random site for a spoofer, or learn how to make one yourself. I also advertise for a small company that has something called a Cleaner, which is what you are trying to do.
If you have been shadowbanned, you can clear your trace files like suggested above, including the Blizzard MW folder, Registry Editor changes, alongside changing your MAC addresses.
If you have been permanently HWID banned, you would need to learn how to change your BIOS information for your motherboard, change your PC name, and change your SSD/HDD IDs to a persistent spoofed state.