Clossing Statement change date

Last month in January around the 18th or 19th of January I called Netbank and requested that they change my Credit Card Payment date as I am getting paid at the 27th of every month but my statement closes on the 16 of every month. The person I spoke to advised that it has been change. Today (19th of February 2018) I received another statement and the sms requesting payment I made another payment and called collection department ( ********** ) and spoke to Lebo who just told me that it was not done and she cannot find any recording on those dates and she doesn't know why it wasn't done. I therefore requested to speak to her supervisor since she couldn't give me any clarity with regards to the matter and Lebo refused and told me that I should call tomorrow instead. Can I Please get an urgent assistance since Lebo cannot send me to her superior for clarity and assistance.