So long story short, I bought my ex (in Australia) an unlocked Verizon iPhone 7 on the condition he would pay me back. We broke up and he probably wouldn't pay me a cent for the iPhone, and now I'm hoping to find a way to blacklist the IMEI as stolen. I don't think Apple will do that and my insurance claim through amex has expired (90 days). He's using Vodafone Australia. I still have the receipt and it was paid using my credit card. Is there a way to blacklist the IMEI once I've given the phone to him?