Cell C Unprofessional

I have been a Cell C customer from the age of 21 and I am now 39 years old. Last year I chose not to renew my 2 year contract with Cell C and cancel the contract but also porting my number to another network provider. I had no issues until last year Cell C gave me an amount that I was owing them R6000, when I queried the amount with an agent last year in January 2023, Cell C then gave me an amount of R1500, when I queried that amount, it went down to R500. I was highly confused because no agent was professional enough to explain to me what was happening. I went to the La Lucia Cell C store on the 30th of May 2023 to ask them how to go about canceling my contract because I would not like to renew my contract that was coming to an end of August 2023 and I would like to port my number. The agent advised me to contact Cell C directly and I only need to give Cell C a 1 months notice. I contacted Cell immediately, spoke to an agent, who advised me to contact them on the 1st of July 2023 and give my notice of cancelation. I asked do I need to give them anything in writing or email, the agent said no need. I contacted Cell C on the 1st of July 2023, spoke to an agent who assisted me, told her that my contract will be coming to an end at the end of August but I will not be renewing my contract will Cell C and I want to port my number. She said that would not be a problem. She advised me not to go to a new service provider on the last day of August, at least wait two days for the porting process to go through. Last year December 2023 I received a call from Cell C, an agent notifying me owe Cell C R1000, I asked what for and for which month because I use to eft Cell C every month and email proof of payment to Cell C, as well take my proof of payment to the LA lucia Cell C store were the store manager Chris would fax through proof of payment to Cell C. On the 22nd of January 2024, I received a call from Shapiro Shaik Attorneys, letting me know that they have black listed me and I now owe Cell C R1500 because I did not pay an outstanding amount of 599 for the month of August 2023. I asked the consultant why did anyone from Cell C tell me, she said Cell C is at fault and they should get professional people working in the company to advise people like myself. My monthly contract was R599 a month because we are now in the month of January, the amount has increased, not because I chose not to pay. I only received proper feedback from this lady working at the Shapiro Attorneys. Cell C, you as a Service provider are unprofessional and want to take people's money without upskilling your staff and provident your clients with proper feedback. I am now black listed for something I did not create. I will make sure to let enough know Cell C is a pathetic service provider.