Whether property tax has to be paid under commercial category

Sir, I recently constructed an house (ground floor and first floor) after getting approval for residential building. now i occupied the ground floor for my professional consulting office (auditor office) which had 210 Sq.m. and the first floor for my residential dwelling 200 sq.m. The tiruchirappalli municipal corporation (tamilnadu) had assessed my ground floor under the commercial category for property tax asserting that i am running a business. As per the TAMIL NADU COMBINED DEVELOPMENT AND BUILDING RULES, 2019 , it allows professional consulting office upto 300 sq.m under the residential zone. In such situation whether the corporation is right in assessing my ground floor under the commercial category? whether there is any scope for litigating this matter? if so how to proceed this?