iCloud remove

So you purchased stolen property from your "friend"...

Some friend...

No. There is no way to bypass it. If your "friend" won't give you your money back, turn the phone over to the police and give them the name and address of your "friend" so they can discuss the concept of trafficking in stolen goods with them.

You don't. There is no way to bypass the activation lock. Only the owner of the account used to lock it can remove the lock.

Talk to the "friend" you purchased the phone from.

As you have been told, there is no way to use that phone without the cooperation of the person who enabled the theft deterrent feature Activation Lock.

You need to find better friends.