Contract Declined yet still ported my number

I have an existing contract with MTN through Autopage, i decided to port directly to Vodacom due to better pricing, i received an sms saying my port was approved but later got a call to say that my contract was declined due to me \not being able to afford R499 pm"so i went back to autopage and decided to just do the upgrade there. To my horror i find out that they cannot do it as Vodacom now has my number on their system. HOW can you port my number if my contract was declined? I want this port reversed asap so that i may continue my business with Autopage"