Lack of service

i have been trying to get through to the COJ via telephone for a good few weeks to query my account which shows a R0.00 balance and i know that this is not right, I know that this is going to cause major issues and i am not getting any help to sort this out, If this account goes into arrears the COJ is going to send me a huge bill which i will not pay. Why is it so hard to get through to you guys i spend half an hour at a time waiting for someone to answer my call this is really ridiculous.