Consumer Redressal

i have given my mobile phone spice mi435 for repair at the service center of spice in the warrenty period as in am out of the city my fther goes and collect the phone which was not repaired as my father not take the phone battery with him at home in evening my brother came from office and check the phone which is not repaired and on the next day my father again went to the service center and clarify that the phone is not working ty then ask money as the phone warrenty ids out and said that you have to pay the money for getting the mobile repaire and they agin deposit my phone and after 25 days as i went ther for collecting my ph that has also not been repaired till now and they ase asking money from me then pls help me that why should i pay the money if my ph is in the warrenty period