Poor/ no service delivery

Since I have this sim card, I have always purchased 100gb (50gb all time and 50gb nite surfer) which is normally valid for 60 days and automatically rolls over from month to month. I like this as it is extremely convenient for my business and personal life because I stream, contact my clients and do my studies and research on a day to day basis. All of a sudden I do not have any data, I contacted cell c's customer center earlier and was notified that as a client of cell c, I need to go into the self service options and amend the data roll over manually and this is why I am stranded without any data. I cannot contact or communicate with my clients and this is restricting my flow of business and hindering my income. I did not receive any prior notification that the 60 days has been marginalized to 30 days and the need to perform these actions manually. this is very bad service delivery. I would like for someone competent to contact me so that we can come to a mutual and civilized agreement on the steps and way forward.