Rain bills me for more than what I use

I was billed twice for this month; I paid R250 this morning and rain deducted an extra R250 during the course of the day. This is the second incidence this year because the same thing happened around May, and I was never refunded for that. I tried calling but I was put on hold for over an hour waiting to be transferred to a consultant. I tried emailing but the address is no longer active; I instead received an automatic reply saying I should click on customer support on rain website side so I can make a comment with regards to the service I am receiving. I followed the advice I received but the system keeps buffering. I feel ****med because I keep paying for a service I'm not using.