Due dates suddenly went wrong

i submitted my assessment on time on its due date which was in June it takes cornerstone up to like 3 weeks to mark it and get back to you , so you get two chances if and fail once u get any chance to redo your assessment and if you fail again you need to pay for it , but my agony now is that on the 10th i got sms from conerstone sayin that my assessment has been marked i logged on and seen that i failed by 6 marks and i had another chance to redo it i also got another sms from they sayin my assessment is due on the 24th this is the assessment that was just marked right and i had my 2nd chance now to redo it. so i redid it and logged on before the 24th to submit and i couldnt submit now it said i need to apply for an extention. i have my proof of the sms sayin that its due on the 24th yet now on the system it say it was due the 12th July already for which i only got my marks back on the 10th anyway they never give us 2 days to rdo they always give us up to two weeks. now they want me to pay a R300 to redo my assessment for a fault that didnt lie on my side but theirs. i called conerstone the minute i seen that and spoke to candy she advised me that i need to speak to my consultant Neo i sent Neo a email and he rep**** back i will include the email i called him on the 24th he advised me that i didnt submit my assessment on time and it wa due in june for which i did submit in june how else where they gonna mark it and get back to me on the 10th, so he says i have to pay the money the sms's are system generated and it was wrong because now the system shows the 2nd one was due the 12th but yet the sms says the 24th which i provided him with proof he still says that this assessment was due and june and i have to pay. but my agony is yes it was due in june and i submitted in June they came back to me in July only so if the 2nd turn had to be done in june they had to send me my marks before end June. i just dont feel that im resposible to pay the R300 when it isnt my fault at all. below i will paste the email i sent him and his reply, i dont see an option to attached my proof (sms)

Good day Neo , trust you well.

I got this sms on the 10th of July saying my assessment for NF405/A04 is due on the 24th July. My marks just came in on the 10th as well. I went onto the system today because I want to submit then I see my status says extension and due date is the 12th July but I have my proof below saying that its due the 24th.

I called you guys spoke to Candy and she advised me to speak to you , please can you assist me with this query ASAP because I need to submit by tomorrow , I refuse to pay for an extension when the sms states its due by the 24th July. Hi Moonisha

Thank you for the below email.

Kindly note that the end date for the project was end of June, yes you received that sms because the system is automated an did grant you a new submission date, however due to the project ending in June I had to reverse it as it was going to overlap.

I will revert to you with a way forward by tomorrow latest.

his way of reverting a way forward is for me to pay the money and i dont have no choice .

Hi Moonisha

The learnership programme has now closed and unfortunately, you did not manage to successfully complete the qualification within the contracted 12 month learnership period. You now have the opportunity to complete your qualification through our Late Completion Process. Kindly note the Late Completion Principles & Guidelines on the attached Application Form. Please complete the Form attached to this email and return it together with your Proof of Payment to this email address before the closing date (14th August 2020).