Rain Billing

Rain has been giving a great headache about their billing. I thought when I upgraded to their 4G life will be smooth but no. I am being billed for my old sim card that is in my drawer for 3 months in a row now. I raised a query and I was told I have 2 sim cards. I have even cancelled the sim guess I was billed for it end of July. The worse thing is one can't even call someone and have a one on one with the consultant . My husband has just passed one who was able to sort the early issues we had with rain. They take R700 + for a 4G which was said it's 400. I have not choice but rather cancel any dealings. I am too emotionally drain to deal witb costly **** every month.