The TV starlet gave birth to Pia this month in Naples, but the Manchester City and Italy striker has still not visited them.
"Mario is irresponsible and doesn't care about his daughter or me," Fico told Chi magazine in Italy.
"He may be 'worth more than the Mona Lisa,' but he hasn't put aside a cent for his daughter. At a certain point, he stopped showing any interest in me or our daughter.
"He was supposed to marry me - that was our plan. Suddenly it all collapsed and I don't know why. I will do the DNA test anyway to prove Pia is his.
"My mother and my brother were at the birth and filmed it, as requested by me. I sent texts to Mario from 15.00 when the contractions started to 18.30 when I went into the operating theatre.
"I emerged and sent more texts, straight after Pia was born. Only at 00.30 did the phone finally ring. I told him I had given birth.
"He replied: 'Ah, ok. I don't care.' And he hung up. That was the last time I heard from him."