Change In Order! Motorbike

I have sent this email to kelly controllers:
Hi,
I have been thinking, and since the order has yet to be shipped. Could I change the Keb controller i currently have for this: http://www.newkellycontroller.com/product_info.php?cPath=24&products_id=564 .
Because the controller i currently have ordered does not fit my needs. Since the price is different could I *Not have the charger. So like this:
- 1 x KEB48300 150A 48V 3KW -$209.00
+ KEB48600 300A 48V 6KW +$349.0
= $149 more
So Minus the charger aswell!!
- 1 x F4815-48V/15A Charger -$199.00
That equals to $59 + which can be refunded?
So the order comes to:

1 x Low Cost Compact Assembly (KEB/KBL/PM ) $99.00
1 x Kelly 48Volt Charge Meter $19.00
2 x Throttle Hall 0-5V Twist Grip(WUXING) $38.00
1 x Optional Waterproof $38.00
1 x KEB48600 300A 48V 6KW $349.00
1 x HWZ Series DC/DC Convertor 48V to 12V 300W $129.00
1 x Hub Motor 48V3KW (High Speed)(disc-brake) $399.00
1 x Kit for Disc-brake Motor(big) $99.00
1 x Motor Tyre (13-inch motor special) with Vacuum births $79.00




$59 USD to be refunded!

Sub-Total: $1,249.00
Table Rate (Best Way):
Total:
$277.00
$1526.00
That is what i would like for my order! If this cannot happen. Cancel my order and i will reorder again!
Thank you
Jake

I will be rethinking about what im going to do with the batteries!
Thanks,
Jake