If the phone came from Vodafone, it may be possible to get this done by sending it for repair, though there may be a charge. Alternatively, you could try going to Samsung - they have a list of repair centres on their UK website. Either of those options would give you genuine firmware.
I've never heard of an 8 digit code, though, only a 4 digit one (though I'm not familiar with the Tocco Lite). I did once encrypt a phone I wanted to reset (4 digit code) and I had to decrypt it before I could reset it (needing the code to do that). It's possible that the device would reset anyway if you enter the wrong code enough times, but that's fairly risky as I don't know what else it would do.
In the first instance, if this is a Vodafone-supplied device, I'd drop into a Vodafone shop and see if they have any suggestions. They may know what to do or may be able to organise the repair process.
