Canara Bank — account npa status problem

Address: 637409

Hi i took education loan in canara bank. My education loan account number is[protected]. I am paying my emi regularly. But last year september month one time account went npa status. I paid that arrer amount also. I am paying my loan monthly without fail. But my loan account still in npa status. Because of this it affecting my cibil score. I am getting 45000 salary per month. Even though i can't get any loan or credit card in bangalore. Because of this loan account, it affected cibil score more. I given complaint to my branch manager. He sent letter to head office before three months. But still no response. I tried to complaint customer care they are simply telling please contact your main branch like this. I called my circle office in chennai. They also told to contact main branch. So i want a solution for this problem immediately. My main branch is sendamangalam branch, namakkal district, tamilnadu. Please clear my npa status and give me good solution