I gave him the money, open a wallet for me and hand over everything but I was care free not minding that's a great investment then, one day I lost my device and that's how I lost the seed phase and the wallet.
Your friends just played you. If they were real friends, they will first give you some basic knowledge about bitcoin and show you how to open a wallet for yourself, not them opening a wallet for you and claiming to hand everything over to you when they can still access it anytime, they like. They knew better than you, that is why they were able to easily fool you into giving them money to buy bitcoins for themselves. Even at the time when they handed the wallet to you, It is possible that the worth of bitcoin they got for you was not even up to the money you gave them. It is good to have some knowledge about something before you invest in it.