Work experiences and NOC

[Chathura111111]

Plz I need a clear answer for this

my actual designation is Retail sales associate if I put noc for that designation it’s going under noc “C”. But actually I have done all duties of sales supervisor it’s going under noc “B”. But my company refuse to include that duties in reference letter they told they will put only sales associate duties and they can’t put actual duties which I have done. I have job contract and all salary slips.. so what can I do for this what are your advices?

Thank you