Warning of criminal activity

My husband and myself were standing at the bus stop heading to fengarola.. we had cases as going to airport..a black car pulled up and offered us a lift to fengarola..he stated that the bus would not arrive as there was a big protest in Marbella..he said it had been on the news..he appeared friendly..so we accepted and put our cases in the boot..a couple of mins later my husband got suspected that something was wrong..he asked him to stop at next bus stop..the driver became very abusive.. started shouting for money..he said that he would keep our cases if we didn't.. I said that I was calling the police and he let us go with our cases..he appeared spanish.had heavy black rimed glasses..my husband was so beating himself up for not protecting us.. please let others know..