Reliance Jewels — extra 25th installment is deducted under 24 installment golden step scheme

There is golden step scheme a/c no. Gs0053204 with you opened at vadodara (Guj) store on 13.06.2018 with a maturity of -24- months. The last installment i. E. 24th is deducted on 15.05.2020 and the scheme period is completed. Henceforth there will not be deduction of any more installment, which is confirmed with your vadodara store, eventhough the 25th installment is deducted on 15.06.2020, why???
All 24 installments are paid on regular basis.
Now please refund my 25th installment amount of rs.10000 to my bank account, which is on your record.
With regards,
Prabhudas patel
M - [protected]