BSA Hercules — Cycle exchange the size

Address:

Perundurai, Erode

Sir, we have bought new Dynamite 26" with shock absorber model. But we realised after reaching home that the cycle is bit hieghter to my 10 year son. He tried but feeling uneasy to get up and down.
We spoke to the dealer to exchange it with smaller size but they hesitate and not agreed. We bought at price Rs 8300
Now it is no use of keeping it home without use. My son is sad and upset now. Kindly help us to exchange it.
Regards,
Srinivasan
Erode(Perundurai)