Vat confusion in rajsthan over memory cards

We were charging vat @ 5% on memory cards in rajsthan as it was IT product in March 2015 there was amendment that mobile and its accessories will be charged @ 8% it was confusion whether memory card is a mobile accessories or not we asked Sales tax department for clariefication suprisingly with their own defination they charged it as 14.5%. can now they ask the difference for previous year??