Lads,
Don’t get stressed about it !
I’ve stayed on La-Toretta in the past, up to 3 months at a time and the meter on my particular pitches were all individually metered, there may be up to 6 pitches & 6 metres in a cabinet on that post, but the meter is numbered according to you’re pitch and you get a reading (you can view anytime) when you go on, a reading when you pay (monthly in my case) and you are charged for your use over the permitted daily usage.
It’s been maybe 8 or 9 years since I stayed there as the site was prone to flooding and there are better sites in Benidorm in my opinion.
There could well be a system as Steve friend states, and if you are content with that arrangement then that is fine too, if not look elsewhere or insist on individual metering.
My motorhome is fitted with an energy monitoring system, I simply zero it on hook up and I see exactly my electrical usage but with almost 700 watts of solar fitted I seldom use power from a hook up point.