Not to sufficient bank balance against cheque & no responding my call

I HAVE SOLD MY VEHICLE .THEY ASKING FOR ORIGINAL R.C.& INSURANCE FOR FINANCE ALSO SIGN THE TRANSFET FORM. HE ( PURCHASER) GAVE A CHEQUE DT.13.5.2018 AND TOLD THAT AFTER 3-4 DAYS TO GIVE CASH AND RETURN THE CHEQUE OR WILL DEPOSITE THE CHEQUE . AFTER CLEAR THE CHEQUE LIFT THE VEHICLE FROM MY SITE. AFTER THAT 13.5.18 WE CALLED THEM AND ASKES FOR PAYMENT HE TOLD NOT TO DEPOSITE CHEQUE IN BANK DUE TO NOT ABLE TO ARRANGE FUND. I TOLD OK YOU RETURN MY ORIGINAL R.C.IMSURANCE AND THE TRANSFER FORM WHICH I SIGNED BUT TILL DATE NOT RETURN THE SAME . LAST 3-4 DAYS NOT ATTEND MY CALL.