Tekashi69 must not wanna get back the chains allegedly stolen from him ... 'cause TMZ's learned he's not playing ball with cops.
What's more ... we're told his driver would NOT fill out a lost property form for the stolen iPhone and would not tell cops if the tracking software had been activated. BTW, we're told Tekashi's GF has also stopped cooperating.
Refusing to divulge what was stolen makes it incredibly hard for cops to know exactly what they're looking for. But, we're told cops are still active on the case because, as we reported, surveillance video backs the rapper's claims.
As you know ... 6ix9ine says he was pistol whipped, kidnapped and robbed ... and maintains it was NOT a publicity stunt. As we reported ... Tekashi's bling is back around his neck, but they're not the OG pieces. He had copies made.