It is your data since it has your name on it
so ask for a copy under the Data protection act
you do this through the company's data controller
Dear Sir, please can I a copy of the letter dated etc etc
The ref giver - hmmm, it looks as though you will be giving HIM a ref soon
Even tho you are only 21 you have learnt a valuable lesson which is by your own carelessness, you have got someone else into trouble - be more careful next time !