North Bihar Power Distribution Company [NBPDCL] — meter related

Address:

Teja tola (railway line), Katihar, Bihar

From 2months i noticed that my electronic meter's reading is not going properly as before.. So pls look into this matter and if nassasary change this meter.
Before 3 month my reading was 1290 but just after its become 1269 and next month it's shows 1270. How's it possible. My house has no telephone television and no ac no fridge... Only 2 cfl bulb so my bill can be less but reading may be desecres i don't have knowledge about that so i complaint into office but they said change your meter.