they dont know their own system

I Have Been Paying on the 25th of each month. Every month I have to call in to get a payment SMS to make a payment for the past couple of months as nothing was debited from my account (Fine not a problem with doing that). Boom Suddenly on the 15th of February I receive an SMS my account is suspended for non payment, called in, I was told Im indeed owing because my payment run is listed for the 1st of every month, I said I did pay on the 25th of January for February but no, I was told this is not how their system works, I asked to be escalated to a Supervisor, Supervisor confirms there is no issues that my account is on track. Got home still no connection called again someone confirmed that they actioned a Promised to pay for the 25th March.... not sure why a promise to pay as I never skipped a payment, but I have the email to cofirm, I was also advised to call in on the 25th of March to change my payment date to the 25th, called in today and was told I only need to pay R294.48 where as I normally pay R529.00 a month..... FOR WHAT My normal payment should be R529.00 not sure these consultants are sure themselves in what they are doing, If I pay R294.48 today then my services will be cut again on the 15th for non payment..... come on guys seriously