Could you please correct my grammar? Does it make sense?:)

Eva told me she was on holiday for two weeks ago. When she returned to work Helena accused her of complaining to police over phone against her. Eva told me that's not true. She can confirm that she was abused by Helena ( one situation when she was in the toilet- Helena pushed her and prodded her elbow) but she doesn't has any witnesses and as soon as Helena found out Eva is pregnant she stopped. She doesn't know the reason why Helena doesn't like her. Eva confirms Alicja gave her letter to sign against the Helena but she refused to sign. She decided to go to the office and tell about situation.