3 PCs 1 Year Protection - Expired activation?

Hi.

I bought Internet Security 3PCs 1 Year protection and had it running on two PCs.

When it expired, as there was no renew option so I removed it and re installed it, but I am unable to activate it.

As Norton help support is not contactable (any help there would be appreciated), I looked on this forum and now suspect that this product runs from the date of the first activation and therefore has expired. I would be grateful if someone could confirm, or otherwise, that this is correct.

Many thanks.