It act regarding in facebook

Hi , Two days ago we got a call on our number from Haryana police cyber cell. He informed us that our number is using by someone for the Facebook account in the name of a girl. We don't know how it would happen but later we found that yes there is a Facebook account with having our phone number . This number belongs to my father who don't even know how to use Facebook and when we had word with the cyber cell officer he told us that this fake ID has been created in September only . in September our mom dad was in Varanasi . The cyber cell officer asking us to come bhiwani in Haryana for the enquiry and aa we are living in Yamuna nagar a far distance from the bhiwani we don't want to go there with just little accusations. I also had word with cyber cell guy and I have asked him you should have the IP ADDRESS as well with which you can easily find out who is operating this Facebook account and from where but that cyber guy is still insisting to come to bhiwani only. Please help us as it unnessary created a havoc or mental depression to our family which have never faced police in their life.