These are some bits of what they said to me last time I tried it on a much smaller product, assuming this is still the case you would be very lucky to get someone one live chat who would refund you the price difference:
Unfortunately we don't have an option.In this case I request you to return the item for the full refund and place a new order with the available low cost
I'd glad to help you with the price difference, but as per our Standard policy, we are not authorized to issue the price difference refund
We do have some policies that we have follow it.
If we have an option to refund you the difference, I would have definitely done it for you in the first instance
Then a supervisor said:
I understand that you want to get the price match for the item.
I am afraid we are unable to match the price of the item. So the only option is to return the item back to us for full refund and place the new order.