looks like the dealer was offering a shonky lifetime update or the manufacturer would be honoring the deal
take the details to a lawyer and see who is being having a lend of you
it is possible that the manufacturer is seeing it as an opportunity to not fulfil the deal
if the user manual has no information can you wifi that to a computer or get updates downloaded to the nav man ?M-Nav 760 User Manual RoW.indd - Navmanhttps://www.navmanwireless.co.uk/wp-content/uploads/2013/.../m-nav760-manual.pd...