Buster Blood vessel Tia

I have been charged too much and I am processing a claim with BOR286 however the 17 figure Charge reference number does not have EC, ZA at the beginning or GB at the end. Where do I get this reference number.

My wife has been charged £148.20 per year class 2 Nic’s every year since 18/19. This is the 17/18 rate. Why has this happened. She is now 5 qualifying years short, but has only under paid by £33.80 18/19-21/22 Can’t comment on 22/23 because her statement does not show class2 or 4 Nic’s Could we please have a answer on this because she wants to stop work but can’t until these 5 years are qualifying.