Tamil Nadu Electricity Board [TNEB] — amount credited but bill is not updated

I paid my eb bill through eb bill app, i just download eb bill app from play store, then i made a payment in this app then there is no update about my payment or there is no information about my payment, so again i paid my bill through an official site,. So please make me a refund of rs.3202 to my account as soon as possible, it's my kind request.