MANCOSA not attending to student's issues - I am very dissappointed with the Institution

I have been calling and sending e-mails to MANCOSA student services since November making a follow up on the marks for Project Financial Management assignment re-submission up to date, I have not received any joy with regards to my issue. Project Financial Management assignment was re-submitted on the 10th of October 2019, of which I received an e-mail acknowledging that my assignment re-submission has been received which was on the 14th of October 2019, I also received an automated e-mail acknowledging receipt of my e-mail on the 16th of October 2019.The results for the final exam for the module in question came out of which I passed, but the marks for the assignment re-submission has not been updated on the system and I was informed that I should wait till the 15th of December which is the last day of the release of results, of which when I checked the system that has not happened. I am currently sitting with an issue of a Module reflecting as a fail for Project Financial Management purely because the marks for the assignment re-submission have not been updated. This could cost me graduating, if they prolong resolving my issue. Can MANCOSA (Student Services) please attend to and resolve my issue, I believe it is not a lot to ask for from the institution.