when you called paypal, they would have asked you some security questions, eg, home town, first pet etc that you set up originally. Then they would have asked you for a phone to send a OTP to. The fact that you gave a phone that was not yours means thatg you essentially broke security. No doubt it was a friend or something but that wont was if something goes wrong. There is no "imagined security", you sabotaged your own security because of some sort of ludism.
"The mobile phone and those who sell/serve them are in charge of when we sit or stand (pay up, you mug)" - you can buy a basic one for £10 one off, on a PAYG, never use it for a call never pay a penny, it will however receive texts so you can avoid giving others the keys to your kingdom.
People like you are beloved of ID stealers because you are not on the grid they can put you on the grid as themselves and make hay.