Senior Citizen Imprisonment

Hi, good day. I am trying to get some inputs from you guys about this case that has been filed 2010 against the 69 year old man for child abuse through lascivious conduct. The family of the complainant didn't want to pursue the case because they said they are just confused that time and what they said was not true, they even ditched the last part of the hearing because they said they didn't have time to deal with the case anymore. Now, the family of the old man, who is now 75 years of age, received an unexpected letter with the decision of guilty of child abuse through lascivious conduct affirmed with modification that he is sentenced to serve an indeterminate penalty of 14 years of reclusion temporal as minimum and 16 years of reclusion temporal as maximum. The question is, is there anyway the family can file to reopen the case or I dont know, any inputs that can be beneficial will be highly appreciated. Thanks.

did the victim testify in court? if there was sufficient evidence already submitted to convict him then the conviction is valid.