Hero Motocorp — take extra money by hero

Address:

134102

I purchased hero splender i3s from sub branch of regent automobile situated at pinjore (Distict panchkulla, haryana) on june 14 2017 (On finace)
Total amount of bike is 53, 352 and i gave 15, 000 as downpayment now the total amount need to pay is 38, 352
And financed the bike by capital first.
Now the amount is need be paid is 43900 with intrest and emi comes out 2223 per mnth. For 24 months
But if i pay 2223 for 24 month then the amount will be 53, 352
Now i dont know where is my downpayment which i gave to hero dealer.
I tried to register the complaint at hero by dialling toll free helpline number but he refuses.
I also attaching the voice recording of call.
Please help to get me my money back.
Thank you