Litterally have Rain to account and will debit whatever

In January 2024 I phoned to Rain to see how I could get the new router. The consultant told me that I would need to cancel my old contract and start a new contract. I had to pay prorate for the new router and he assured me that the monies will be offset against Januaries payment. When I received my new router I phoned Rain and told them I received my new router and that they should cancel the old one etc. This month Rain deducted R1,134.82 from my ACCOUNT! I have phoned multiple times but I keep being told that you are having technical difficulties and cant see the invoices. Furthermore, I received an email to say that the old contract will only be deactivated end of FEB!!!!!!! I am highly upset, the saddest fact is that you guys have ‘rain’ to my bank account as an online purchase vendor and I am unable to reverse any of it. Please contact me asap for a refund! I will NOT keep quiet about this.