So disappointed in MTN!!!!

So disappointed in MTN customer care and upgrade department. Being a customer with them for 18+ years, I never would have thought that i would ever receive such bad service. I renewed 3 of my 6 lines which i have with them early April already. I am yet to receive the free 20gig once off data for all the lines. With one of the lines there was a promotional pack(which included a sound bar, phone ring etc.) which I'm also still waiting for!!!I called numerous times with only being told that Customer care cant help me , i have to speak to MTN's upgrade department .I've called a few times on *** and ***(the calls keeps dropping, sometimes just ringing like the department was closed), sent e-mails as well, even received a reference number(which is ENQUIRY REFERENCE NUMBER ***) but still waiting on the issue to be resolved more than a month later. By the looks of things, my other lines which are due for upgrade also this year, will be cancelled and i will find another service provider who knows the meaning of the word customer care!!!