Dissapointed with Rain

I had my sim and router delivered on the 24/085/2023. At 10:28 I receive an sms saying that to stay connected I need to make payment of R832 which was not agreed upon. The amount that is due on the 1st of each and every month is R559 which was also confirmed by the rep. I call to find out what the sms is about and I'm told that my account is behind which could lead to disconnection. First of all it's not my fault the rep did not do what was supposed to be done on the system and 2nd of all that amount is new to me. I was told that someone from billing department will call me and I am still waiting. I am starting to regret the decision of having the contract with Rain. I am very disappointed.