RSA WEB Billing, Accounts and Ill-mannered Staff

I joined RSA Web last year as an LTE client, then in May 2025 went over from LTE to fibre. In installation went so smoothly and I was active two days before our planned date and it was an amazing process and team. Then came the billing...Well, I signed up with the promotion of R699 per month for the first 2 months on the 100/100mbps package and then R945 (regular price) from the third month. The billing team charged me R945 and also used this as the basis for the pro-rata charges. I had to phone a few times to get this out and deal with people in the billing team that have no manners, the men spoke to me as if I am not worthy of the air I breathe. Either they had no idea of the promotion, which is concerning, or they were taking chances by billing me the full monthly fee and using that basis for the pro-rata because we are to pay by debit order and the money will go off and they get away with overcharging. I feel like it is the latter, they had to log a ticket on 29/05/2025 to pass a credit for the overcharge which was never done, it was only done on 02/06/2025. I paid as I calculated the day I received a confirmation that the credit ticket was logged, the payment was allocated and I received a statement yesterday morning at 9:19am confirming that the credit was passed and my account was now in credit with R1.05. Yesterday afternoon, just after 1pm, a woman by the name of Amelia calls me demanding payment of R277 and a few cents. I told her about the credit and that my account was in credit and she very indirectly accused me of lying and demanded I make payment immediately. Not to mention, my account was in line for suspension just because the person that was supposed to log a ticket for the credit on 29/05/2025 did not do so. It's ben 2 days now that I have been trying to get hold of a manager there to find out what is going on there, because it seems that there is no communication between staff members there, their male staff (no all of them) are gender biast and their female staff (not all of them) have mood issues. The projects and sales team are amazing but the billing and accounts teams are horrible, ill mannered and poorly educated pertaining to customer service. Today (10/06/2025) I have spoken to 3 different people and I have been on hold for over an hour just to speak to a manager to find out what is going on there.