Rain Data has just turned into a nightmare!!

I unfortunately had to cancel my contract due to connectivity issues caused by loadshedding in my neighborhood.I notified Rain on 04 Jan 2023 that I was moving to another provider. By mid April 2023, I was sitting with a big bill because noone actioned my January email.When I contacted the support desk, they said it would be done and credit notes would be passed for the incorrect billing which they did.Yesterday I contacted them, my bill was R1157.77 and they said they would look into my account. Just a few minutes ago, I got as sms indicating that my bill has escalated to R2956 and that I must pay within 24hours.How did that happen?My router has been off for months.A call agent I spoke to yesterday said payment is made upfront, but the guy in the billing department said it was at the end of the month based on usage.How is that when you are on an uncapped option?If you delay payment, they send you messages to pay up or they cut you off if you dont pay so how does my acount end up in such arrears?Is there anyone who really knows what they are doing at Rain?Piece of advice, rather make manual payments to Rain because even after cancellation, you will end up with perpetual payments going off your account with such confusion and incompetency.I have seen several people with a complaint similar to mine online.Surely by now you would have improved.It was good while the signal was good and my subscription running but the cancellation seems to have created a nightmare for me!