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The portion of the AP-7 that runs from Alicante to Tarragona reverted to the Spanish government on the first of January of 2020. Starting that day the motorway is now free to use without tolls.
As the infrastructure can't be dismantled immediately, it may happen that they were still charging drivers a few days after it reverted and they have to reimburse you afterwards.
Last year I traveled on another Spanish motorway that had just reverted and they simply left the barriers open. There was a big queue as foreigners who couldn't read the signs tried to use the deactivated toll machines, if you don't speak Spanish you may also have missed those and paid anyway.