Hi, I owe barclaycard in the region of £3,000 but have heard nothing from them in 2 years, does this mean my debt is no longer, is it wise to call them or just leave it. Thanks

I though a debt stayed on your credit report for 6 years
Have you moved home and they cannot find you?
I would try a credit referance agency see if it is on file if it is contact barclays and offer them a payment plan and maybe even not for the full amount. Some take this just glad to get some money back.
But if you are not really bothered about this leave it till they contact you then make an offer of payment but if you have not heard anything in all this time you maybe OK and had all that money for free