Cannot pay them Monthly

I wanted to sign up on condition that I do not have a contract which effectively means month to month. I agreed to pay for my tracker and I informed them that I will institute a stop order on my account instead of a debit order because it's a month to month. I was informed that if I want to do that I must pay 12 months in advance. Now why would I opt out of a contract and still pay 12 months in advance? Really cartrack, you just want to force people to have contracts.