What kind of pension was it ? Defined contribution, defined benefit, personal pension ?
It is certainly true that you probably can not touch it till you retire but you may be able to transfer it to another pension scheme - although whether this is in your best interest or not is a difficult question to answer without a lot more details.
Transfering to another country is possible, at least theoretically, but in practice I'd say it would probably a long and difficult route to undertake - notwithstanding European law