Dissatisfied Loyal Subscriber

I am very disappointed and disgusted by the level of service and ignorance that I have received from Cell C customer services regarding the unblacklisting a device that I have recovered.
I called Cell C to request my handset to be unblacklistesd after I recovered what I assumed was a ****** handset.
The agent was very nice and advices me that the query was escalated to the back office with Ref No: *** and the TAT would be 24 - 48 hours which lapsed and the handset was still not working...
I then again called Cell C a little irritated and was advised that the back office wore working at a backlock.
To cut a very long story short I called the third time as was told that the query was still in the queue and was still pending and again the agent was so nice to say that the query was escalated to a supervisor who would mark the query urgent as the TAT had lasped.
Then I was sent another text message with Ref No ***
What irritated and found appalling was the text message I received on the 08.02.2021 advising me that the unblacklisting could not be actioned as I did not submit the relevant documents!!! What documents ? Because I was never told about the documents!!!
I called the contact centre at 12:51 got through to the Johannesburg contact centre and Spoke to Mbali requesting to speak to a supervisor and was told to hold and after holding for 06:56 the line just went dead!????.
Very angry I dialled again at 13:42 and got through to Sinenhlanhla at your Durban contact centre who, after requesting to speak to a Supervisor, the same thing happened again... Line was disconnected!
I called the third time at 13:53 and again was diverted to the Durban centre, spoke to Zandile and again requesting to speak to a supervisor , was advised that supervisor named Mthokozisi Ngobese would take the call and was placed on hold and for the third time call got disconnected ????
Now at 14:20 fuming I redialled and this time got through to Johannesburg centre and Nompumelelo answered the call and I requested yet for the forth time to be put through a supervisor and obviously was placed on hold and when Tshepo took the call, it disconnected and this time He called me back and was not much of help and kept on referring to the Agents who are based at the satellite contact centre and could not offer any solution or way forward to the matter at hand! but had the nerve to repeat the same content I received the very same day via text message.
My question is... Don't all the customer service agents receive enough training to be fami**** with processes in place for different queries they deal with on a daily basis? The time I wasted waiting for the handset to be unblacklistesd and being told about backlocks from the back office, the emotional drainage I experienced for merely requesting to speak to a supervisor and being disconnected several times!!! ????.
Being a customer services champion myself, the level of service I received was sooooo unprofessional, disgusting and shameful and I intent to take this further because I cannot be expected to allow this kind of unprofesionalism for being loyal to Cell C for all these years!!!