Got no service ,yet they are billing me

I was studying with College SA,but was recommended to take a financial break instead of cancelling my contract as they claimed it would be cheaper.I wanted to end the studies while my account was up to date, i emailed and tried getting in contact but no one rep**** and after a few months of not paying they finally contacted me and I've been trying to cancel my account since 29th of March 2015. During my financial break I spoke to Liticia du Plessis(from head office) and Johnny Snyman (from billing department) and complained about this when they said i should fill in the cancellation forms and they would get back to me, i sent them proof of everything and my bank statements which clearly proves that i am not able to pay the account anymore ,i had just received a reply that my cancellation request was denied,however they neglected to contact me for 4 months about this(me wanting to cancel the account). I have been patient and filled in all the forms and given proof that my cancellation should go through,even though my account is not up to date anymore ,because they waited months to contact me.