Tamil Nadu Electricity Board [TNEB] — tangedco ae application fees transaction problem

On 13.03.2020 i had paid tangedco ae application fees through online for rs.1180 (Amount debit from bank) but after payment website shows "payment pending". So i tried next day 14.03.2020 and amount 1180 debited they shows "payment pending". Then i tried one more time using my mother atm card after 2 days (16.03.2020) amount 1180 debited from bank but shows "payment pending". Totally 3540 debited from my account. But on 16.03.2020 afternoon 1st payment shows "success" but other 2nd and 3rd payment shows "refund is in process". But still now (After 3.5 months) i didn't get refund. Please refund my money and when will i got money.
I had attached my details below:

1st transaction details:
Payment details
Application no. : c0421334 name: dharanidharan. S p
Amount: rs. 1180
Receipt no.:pgnsbi8707868 receipt date:13/03/2020
Bank transaction no.:igaihoeih1
Bank confirmation: success

2nd transaction details:
Payment details
Application no. : c0421334 name: dharanidharan. S p
Amount: rs. 1180
Receipt no.:pgnsbi8713376 receipt date:14/03/2020
Bank transaction no.:igaihtigl2
Bank confirmation: refund is in process

3rd transaction details:
Payment details
Application no. : c0421334 name: dharanidharan. S p
Amount: rs. 1180
Receipt no.:pgcaxi[protected] receipt date:16/03/2020
Bank transaction no.:[protected]
Bank confirmation: refund is in process