Dealer added options that i did not approve of!?!?

I recently bought a new scooter from a dealership and they added a 900$ option that i did not agree to in my loan. I just noticed this because originally it did not look like a noticeable difference until i looked deeper on my first statement in the mail. I know its my fault and i should be more careful but is there anyway i can call the loan company and tell them that i do not want this extra option and to remove it from the loan. The extra option was just a "if its stolen you will get what its worth back outside of auto insurance" which isn't nessasary to me. Please help! I need to get this off the loan since its 1/4 of the total! Thank you :)