Y can't upgrade be a contract as much as is downgr

I feel multichoice has taken advantage of us as customers, if my subscription is on a monthly basis why cant it be the same with downgrading??? why should I wait a certain day to have my service downgraded but when I upgraded they were willing to do it anytime? since its a contract for a month it should be the same for both downgrade and upgrade... I'm waiting for the day they will have a real competitor cause I believe this is the only reason they are coming with such unfair contract.