Posted: 25/09/2017 at 11:40
Well, whatever it is and wherever you got it from, it's not a lemon tree ... for future reference, lemon trees have glossy leaves.
As has been said, pop some lemon pips in a pot. You'll get some lemon seedlings for free.
You can do the same with oranges and grapefruit ... my conservatory used to be full of beautifully scented citrus when my children were young as they were continually popping citrus seeds into pots.