Sales 50% down today

Hi guys my sales have droped today for 1st time in months…gone from 200+ daily…so far today 73 so very slow

I have had 1 a-z claim last week
my VTR is at 66.67 ( 1 missing tracked item) mainly sell FBA
My ODR is at 0.22%

Not in my eyes anything big to have such a big change…

anything else that will effect Buy Box???

Just adding i did get my VAT number and added this yesterday would this cause any problems???