I think in that situation it is better to raise CSE to tell that you chose a wrong NOC and describe why you did that. Because how I understood your question, problem is not with experience but with a NOC code. Your experience might be eligitable but be included in another speciality.
I think many people choose NOC wrong, they just don’t know about it. The classification is very blurry and sometimes a lead statement doesn’t give a clear understanding. Moreover, sometimes the main duties contradicts with it. Just look at the engineering NOCs 2131, 2132, 2133, etc.