Had policy for 19 years whats its value

You should have been receiving annual statements telling you what it's worth. If you want to sell it early you are best off phoning the company involved and asking them. Also ask them what would be it's value if you made it a paid up policy rather than surrendering early. That way you wouldn't have to pay any more into it but you'd still get the bonuses, if any, from it on maturity.