Bad accounts department

I am tenant of Natrent for 2 years already, in November 2019 we were informed that we are going to pay extra for water sewerage and refuses which we accept to pay. Today the 28th July 2020 we got our statement and a extra 220 was added when I query it I was told Melisha Smuts who works in accounts department had made a mistake and didn't add it to my account since November 2019 then I was informed today if Natrent want to they can back date the sewerage from last year up to date which I am liable to pay. They are doing the statements and I am paying as per the statement. Then I was told they have decided they will not add it and I need to pay it going forward. My question is how many tenants had the same mistake on there statements it is not our tenants duty to investigate the statement.

Belinda you are still nr 1 at Natrent ur service is still the best now matter what I ask u assist me

May there be more employees like you that is going out of your way to assist us.

Thank you Belinda for everything wish I could say it about the other staff.