[SM-G930W8] Custom binary blocked by FRP lock

Hi. I bought a SM-G930W8. I live in Europe but I bought the Canadian Galaxy S7 because it was half the price, bought from Italy from a street seller. It was sim locked and a friend of mine unlocked it for me. I think the firmware was ROGERS because it had rogers apps. It was rooted, it had custom recovery (TWRP). I turned off OEM unlock and after a restart it was FRP locked: "Custom binary (recovery) blocked by FRP lock." it also says "dm-verify verification failed... Need to check the DRK first...". I tried flashing G930W8VLU1APB7_G930W8OYA1APB7_BMC_FULL (Bell Mobile i don't know the source) via ODIN, no luck. I also tried G930W8VLU1APD3_G930W8OYA1APD3_RWC firmware (Rogers firmware from sammobile) with ODIN, and still no luck, and G930W8VLU1APD3_G930W8OYA1APD3_XAC (no carrier Canada from sammobile), no luck. ODIN says passed but it still remain FRP locked and "dm-verify verification failed... Need to check the DRK first...". What can I do to recover my phone to stock? I want it stock firmware from Canada without root and custom recovery. If I get this phone to a Samsung Service Centre will it be software repaired? The bootloader is locked, I can't flash things, only stock rooms but can't boot. My Galaxy S7 is bricked.

Sim is unlocked, IMEI is not blacklisted, I don't know the serial number, FRP lock is on, bootloader is locked, bootloop is present, OEM unlock turned off and "dm-verify verification failed... Need to check the DRK first..."

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