Try get indemnification from them. Not easy and will drag on for years whilst you without a vehicle.
Regular law covers this area, indemnity is neither required nor sought. Whether legal procedure is quick or slow, the court would rule against the police with costs. The SAPS already pays out tens of millions annually for false arrests, wrongful deaths, police brutality etc. No more difficult to win a case against the SAPS than Joe Soap. The police have no jurisdiction over the courts.