and said some things that i should'nt have.
Don't worry. They are used to hearing things that shouldn't have been said and generally will not hold it against you. Not for a long time anyway. Unless it was particularly offensive or particularly remarkable (read stupid) and you have a voice that's easy to remember. In which case I suggest paying them a visit, bring chocolade chip cookies and humbly apologise.
If it's an official NATS-provided service (as opposed to AFIS or A/G) it will probably be caught on tape though, so if it was incriminating, call a lawyer.