Just as Ethel says.
All the folks previously selling new timeshare now put their energies into this approach.
There is little or no evidence that timeshare is being resold from these 'offers'.
One pays money upfront to cover their costs, to be repaid in plenty when the (inflated) price they are offering comes to fruition. Then, mysteriously, the buyer withdraws or falls under a bus.
700 Euros already lost - take action with CC company to ensure they don't release any more. That shouldn't happen as the Malaga company has no mandate, however the 700 is unlikely to be returned by the CC company as the authorisation was properly made and signed for.