TFG & One2One Data Contract Upgrade....A nightmare!!!

I have been a customer for almost 30 years and had a top up airtime and data contract for almost 10 years with them too. On 27 September 2019, I called to do a data upgrade, this has been a nightmare. I have tried to do it a few months ago to no avail. One2One & TFGData highly ***********. There seems to be a problem that no one can fix to date (15 Oct 2019). I am so disgusted and disappointed that I just cancelled all my existing contracts with them!!