Poor service

I have been with Vodacom for several years, still on their old M2 system. For being a loyal customer, I had endless problems when I tried upgrading with a whole list of escalations to overcome their system limitations. Eventually when I logged my number for cancellation, I was able to upgrade. Agreed on the device, the once off data, the monthly minutes and data along with an additional 3GB data at no extra cost. When I queried why the 3GB didnt show on the app, I was advised that only when the once off 20GB fell away, they would be able to activate my 3GB of data. Guess what, the month has expired, the 20GB data fell off and still no 3GB of data to be seen. I have been calling almost daily, being told that my issue was being escalated - nobody calls me back. You have call recording, what is so difficult, that you cant access the call recording, confirm what was promised to me and activate accordingly??? If you cant resolve this due to your system issues, please take the time to contact me, advise me, cancel my service, fetch your device - ALL AT NO COST TO ME as this is NOT a fault on my side - so I can move on...after all these years....SHOCKING SERVICE or lack thereof!