How could i detox my system of crack cocaine fast?

You can't: Cocaine leaves the body very quickly, within hours of taking it (and actually is converted to its metabolites in the bloodstream within minutes - which is why it is so short-acting). The metabolites are not active, other than the combination product with alcohol (cocaethylene), which is more toxic and longer-acting than Cocaine itself. The metabolites leave the body in 3 days, nothing speeds it up.