Someone stole my Razer phone. What should I do?

Hello. Today is a sad day for me. Someone stole my Razer phone. I've used it to secure all of my online accounts with 2FA, and now I'm trying to remove the 2FA from all of my accounts. I've never had this kind of thing happen to me before. So I'm looking for some quick good advice on what I should do. I've read some posts online about being able to get an "operator" to blacklist an IMEI number. But I'm not 100% sure I understand how to do that properly. My phone was locked with fingerprint and pattern lock. But I'm concerned that someone could just do a factory reset and remove those locks to use my phone. And then I'm concerned about whether or not they'll have easy access to my personal data on the Micro SD card in the expansion slot. Will a factory reset erase that data, or only data directly on the phone's internal storage? If anyone can provide me some good legitimate tips to help me protect myself and my accounts and also how to best insure my stolen data can't be used against me I would really appreciate it. I'm really upset right now and can't even sleep because I'm so worried now.