Unauthorised Debit Order

I had a lady Kerisha call me months ago to remove a flag in my name , she ask for my details to see if I qualify for the assistance, once I was approved she asked for documentation to complete the transaction, I told her on Watsapp that I’m busy I will get back to her , without my completed documentation she loaded me and was debited my account R2000 25th every month and there was no funds as I dnt have the budget for this service this is why I told her I will get back to her , this company changed the debit order date and 24 Oct R2000 meant for water and lights was debited. I tried to dispute at bank they said this company can only cancel or refund then I called spoke to an extremely rude lady Shelia who treats ppl like garbage , and says she can cancel my future debits but dnt give refunds this company is a ****. These ppl have no idea how they have inconvenienced my life and ****med me into signing for this service. Can I get urgent assistance on how I can get my money back