I've had a few "damaged repairable" cars now, and found that cat C and cat D are confused a lot with the insurance companies. If you still have the V5, you should not need to get a VIC check done. If the MOT tester managed to perform a test on the VOSA-linked system, then the test is valid and shows the vehicle to still be on the system. This sounds more like a cat D write-off, and the two I've had haven't had the insurance cover terminated or endorsements put on the V5. Best to speak to your local VOSA test station, and get some advice from a ministry employed tester. They'll be more up-to date with the regs.