Poor service from Rain

I used Rain Internet Service Provider for two months as I was teaching from home and I needed sufficient data for my online teaching. I cancelled my subscription in June as we returned to school and I no longer needed this service. I received confirmation via e-mail from Rain that the cancellation had gone through and that my Sim card was deactivated. The e-mail was headed "No Hard Feelings". I assumed that the admin was over. However, I was stunned that on the 1st July I was billed R479 from Rain which is the monthly package that I cancelled. After chatting to a colleague from work who had the same experience, I posted a message on Rain Support site and received a reference number and an automated reply stating that a consultant would respond to me in 24-48 hours. That was over four days ago.I then sent them a few direct messages on the Facebook page and was told that the query has been okay escalated by the admin. I then received an email from Rain but addressed to a Mr Krishnadutt who is definitely not me. The email talks about a telephonic conversation which never took place, so clearly I am being confused with another client. I responded to this email and explained that I am not Krishnadutt but didn't receive any response. I sent Rain a message on Facebook messenger attaching the email and again no response. I have no idea how to actually speak to a consultant. I want my money back from them and I want them to acknowledge the fact that my account is cancelled so that I do not get debited again in August. I have wasted so much unnecessary time following up. If anyone is considering using Rain data as a means to work from home, I would rethink your choice. The admin is not worth it.