Mahanagar Gas — Amt paid yet showing in new bill unpaid

Address:

Mumbai, Maharashtra

My CA No:[protected]
So I had paid the bill on 26th August 21, of Amount 2432. I received a notice on 20th October 21, stating I didn't pay . But the amt was debite in from my sbi account and it is also showing in pass book same. Now the new bill that is showing is including the previous amount.
I gave a cheque of the whole amt and realised later that I had already paid the amt in August but yet is showing unpaid. I want the cheque back and issue only for the amt unpaid. Will the person who collected return my cheque.
Plz contact me on [protected]
Or my email: [protected]@gmail.com