Poor customer service

A week ago I did an upgrade on my existing contract with MTN, part of the deal was a 20gb once off data which would be valid for 30 days, it's been more than a week and I haven't received the data. I called 135 and spoke to an agent who said he cnt assist due to system issues and he transferred me to someone else, I then spoke to an agent named Sandile who was rude and in my opinion useless, after going through the authentication process he proceeds to give me information about when I will be credited with my monthly minutes which was not my query, he then tells me he is unable to assist with my query, upon questioning him mid sentence he rudely puts my call on hold.... I had to call back and spoke to Janet shange who is in fact a true service champion, she gave me excellent service and actually knew that there is a general issue where many individuals haven't received their data. She has logged a query and I look forward to having this resolved. Janet was polite and helpful and deserves to be recognized for her great work ethic whereas Sandile needs to be dealt with for his pathetic customer service.