ROME (Reuters) - Italian Prime Minister Silvio Berlusconi accused magistrates on Saturday of illegally spying on him as he refused to appear before prosecutors who allege that he had illegal relations with an under-age prostitute. I am not running away and I am not resigning, Berlusconi said in a phone call to a meeting of his People of Freedom party. I am defending myself and reacting to what is truly an attempt to subvert the will of voters, he said. Milan prosecutors allege that Berlusconi paid for having relations with a significant number of prostitutes, including a 17-year-old nightclub dancer, at parties in his villa near Milan. Leaked transcripts of phone conversations between more than 20 women who attended the so-called bunga bunga parties at Berlusconis residence have been splashed on Italian newspapers for days, piling pressure on the premier. But Berlusconi said the wiretaps were part of an illegal political, judicial and media campaign to destroy him, defending his right to privacy and calling the accusations ridiculous. Since the beginning of 2010 all the guests that came to my house in Arcore have been subject to continued phone tapping ... Is it normal in a democracy that the prime minister can be subject to this type of controls, to this spying? he asked, to a chorus of No by party members.