sudden increase in freight price for lipos that i havnt ordered

Hi I was just tryinhg to complete an order to New Zealand. My orders are usually sent by china post or similar. this time the only option is fedex because it says i have ordered 8800mah of lipo batteries. I only ordered 4000mah, and even when i remove them completely from my order the freight cost is still about $15 more expensive than usual coz it says i have lipos in my order even when I have none.
I will not purchase till this issue is sorted. fedex is far too expensive to new zealand