Service fee keeps on changing why?

On the 30th of November I called Dstv customer service desk to ask them how much must I pay on my account I was told R525.00 which I paid after that I called I was told my account is up to date.Around after a week my services were stopped I called the lady told me I have to pay R245.00 or around that amount I questioned her why she said she is not clear why?But she will reconnect my service.Most of the information on their system was changed because before they used to debit my account on the 1st now she said it was changed to the 5th I told her to change it to the 27th since I am getting paid then .Servuces were reconnected after a week it was disconnected again I phoned they told me I have to pay R106.00 and I asked why there's a change in the amount?The consultant reconnected the service after a week on the 16th it was disconnected again called in spoke to Keabetswe who was really helpful she explained everything clearly ref number ********** 0-I55 .She said I must pay R155.00 for my account to be up to date.Now I ask myself questions why is my balance keep on changing are all Dstv consultants using different systems?She explained that when I paid on the 30th My account was in areas which I fail to understand because when I called the service desk I wanted the total amount I needed to pay so that my kids can watch the Tv the whole month without any disturbance and now it is no longer my fault it is Dstv who failed to give me the correct amount.Now I am on vacation my kids call me to say that services have been cut and I won't be able to pay.All I am saying from today no one will cut my Dstv service because it's their own fault not mine for I got the amount from their consultant.