BSNL Prepaid Mobile Excel Student Plan — Cannot change my Prepaid Plan

hi

i am using bsnl network with Excel student plan from last four years. when i taken this plan that time iam a student but now iam not a student i want to change this plan but bsnl call center persons says its is not possible. I just want ask why its is not possible to change this plan in to Genral plan. what is the reasion pls bri[censored]s because this your job. i am so many time complained to bsnl call center for this but iam never get positive responce. so here we can understand bsnl employees are so wrost persons if we compare to another telecom company we get responce with minutes only the diffrence is they are private company and this is government compay this people getting some thousant of rupees as a salary and work responce is like this. i am realy apoligise for this words but really u people behave very bad.pls i want to change this plan in to genral plan.atleast reply and kind of responce to my email.

Thanks & Rgds
Santosh

am using bsnl genral plan.last month am change to new plan 3star.now am go for genral plan pls help me