your blank cheques are dated if so the checks after 3 months from the date of issue is not valid.
if not they might put date and file cases.
you have to contend that they forcibly had taken cheques by forcing you to put signature on the cheque leaves, that forcing can be construed as actus rea and mens rea of the lenders to cause undue threat on you.
then they cannot proceed on you under sec 138 r/w 142 of negotiable instruments Act 1881.
they might move against you by a civil action that is indeed a long drwan fight.
you have to make a say in your petitions that they had taken payments of interests by deducting from their initial lending m ight be you might have issued sheques if so, usurious interest law might be applied.that means fight would be longer.
in the mean you could generate funds and pay the basic loan amount to court against each of the lenders. so your genuine interest to pay you might prove to the court, court would not allow you to pay more than permissible interest that would mean your initial payments at the time you took loan would also get accounted.
so if the lenders move against you they would be losers.
that way you issue the legal notices to lenders. see their reaction