Appalled and frustrated at this service

I have never in my life been so disappointed, frustrated and disgusted with a company before... I app**** online on the 28th of November 2022 for the black Friday special for C-fibre... first 3 months free and thereafter 50% discount which was suppose to be R559 per month for the 500mbps/200mbps line. Instalation was done mid December 2022 and low and behold... cell c started charging me the full price from month 1! It took numerous phone calls, tickets opened and closed, emails and alot of frustration to be told by a supervisor in Feb 2023 that all is sorted and you will get your first 3 months free (mid Dec to mid march) and the discount will be added to my account so I'll pay R559!! Something went seriously wrong on cell c's side because instead my account was not only deactivated but I no longer had an account at all... my fibre was off most hours of the day but in all honesty I thought it was due to loadshedding and a bad infrastructure, not one single person phoned me to tell me that the automatic debit order was not active and payments were not recieved. What I thought was sorted out was actually just the start of my problems... I've now been without fibre for more than 6 months and apon inquiring why my PON is always flashing and my router 'i' light is always red I was told that i don't have an account with c-fibre!! So... I app**** for the black Friday special... I was charged full price, I then had to fix that and was then promised the first 3 months free which I then got but instead of charging me the R559 I was promised, cell c decided to rather cancel my fibre and not tell me!! I am livid! I am now being told to re-aply but cannot be promised my 50% discount I signed up for all because cell c decided to cancel my fibre without my consent!! I have never struggled so much with a service provided before... I barely even have the strength to fix the mess you at cell c have created for me!! How do we go about rectifying all of this without me having to repeat my story over and over again to 20 different consultants so that I can just get the fibre I signed up for on the 28th of November 2022 and pay the promised price of R559? Please help me!!