False advertising and misleading Rain Data

So we've all seen the Rain Data ad that tells you "Affordable data, no contractional obligation" ect since I was in need of better internet I decided to buy the sim from take a lot and followed the instructions. I checked whether the internet is available in my are and it was I created the profile and paid first month R479. After registration internet was not available and we couldn't use the sim card I reached out to them no reply and decided just to cancel the service. To my horror I discovered last night they've been taking money monthly since January without my approval or authorization I contacted them immediately to which they rep**** (Unfortunately the package you are currently using has a recurring charge thats not billed based on usage but according to activate service. To avoid being billed you can cancel the service) I tried cancelling the service and its asking me for a cancelation payment of R479 that will be deducted 1 June no part of me agreed to this they never sent an invoice or indicated these were the terms. Absolutely horrible I am now on telkom and will change my bank information because the ad is misleading and communication poor.