SP is swiftly treading you for an entrapment. SP must've marked to SDPO of Area who marked it to concerned SHO who further pushed it over an I.O, this is as per THE Book, any lost property recovered is processed through court before return to Owner.
I.O will plainly write, " the applicant has failed to produce the vehicle and surrender to police station, we are not sure if the allegedly recovered vehicle is the same as per FIR or it is case of vehicle tampering aka another stolen vehicle, observation is submitted for further instructions to process the FIR cancellation request"
It will head back to SP office and he will ask you to produce / surrender vehicle. if you act stubborn SP through the CCOP Faisalabad will issue a notice to ETO Mardan to explain under which clause an stolen property is returned without due legal process.
i'd suggest play your cards right handle carefully, civil court lawyers' play on both sides.
Stop any work upon your car immediately. scroll up and read my cautions which you ignored in excitement.