Idea Cellular — change of my plan and deduction of my 500 mb

Address:

Bellary, Karnataka

I have brought SPICE sim card bearing no.[protected] last 7 or 8 years back my plan was 20 paise for spice to spice and 40 paise for other phone. After SPICE campany change to IDEA my plan was almost same for last few months suddenly they change my plan to 30 paise for IDEA TO IDEA and 50 paise for other net work mobile without giving me any notice when I asked me they told me that my sim is DEMO Sim how can it is I have used the sim for nearly 7 to 8 years and recently I paid 155/ for 3 G internet connection for one month after 3 days they deducted my 500 MB with out using internet when I asked they told me that you have used the internet how can it is possible if I have down loaded any thing it should be in my mobile with that how can it possible please help me solve this problem with my company. Thanking you sir