Power of arrest has to be sparingly used when absolutely necessary in the interest of the investigation or to prevent the commission of any cognizable offence.In the instant case, when the bail has been rejected,ask the aggrived person to send the evidences by the registered post(not by courier) to the superior officer having jurisdiction in this case so that he may know the fact, send it to the OC who in turn will give it to the I.O. There are many ways to get your points on record but at the stage of investigation the courts have got no power to interfere except to grant bail, which has unfortunately been rejected.This means that there are materials on record. There is law to deal with the false cases and prejudiced police action under law like section 218, 220,211,182 IPC etc. but you have fallen in well, first get out of the well and then take action. If you shout on the offender down from the well ,he will not allow you to come out. And other thing more ,make a CD of the telephonic conversation and send a copy to the Police to analyse the fact.