******* activity And ******* account authorisation

I was billed by rain last night whereas I did not use their services due to none network coverage within my vicinity then I called their support structure regarding my refund and I was told a whole different story that was not initially disclosed,I want my money back and I called my bank to assist with the refund however they told me that they can't as this was not a debit however a payment,the reason I opted for rain was of the fact that I am not taking any contract as this was only pay as you use package so why do you Bill me if I haven't use any of your services,I want my money back and I will also warn those I referred to you to stop using your services as it's *******ly taking my money without my concern and if this matter is not resolved urgently I'm taking tis matter to the highest authority (The ombudsman)and the ICASA for false advertising.