Next time use your book vouchers to buy some books, learn maths, electrical engineering and possibly embedded programming skills.
You'll be able to repair your own switch and earn some cash. Then you won't be out of pocket and your mum won't have had to use her hard earned cash to get your switched repaired.
You could also earn your own money too rather than waste your book vouchers.
But in all seriousness I think you just made a bad choice and would have been better waiting till you could afford to buy a guaranteed hackable unit.
Is every new unit out there ipatched now?
And what was wrong with the unit originally if you were able to use l4t on it what happened?
You'll be able to repair your own switch and earn some cash. Then you won't be out of pocket and your mum won't have had to use her hard earned cash to get your switched repaired.
You could also earn your own money too rather than waste your book vouchers.
But in all seriousness I think you just made a bad choice and would have been better waiting till you could afford to buy a guaranteed hackable unit.
Is every new unit out there ipatched now?
And what was wrong with the unit originally if you were able to use l4t on it what happened?