Cell C shocking service

Cell C I am extremely disappointed, angry and fed up with your service. I am with Vodacom, my mother is on Cell C. I switched to Vodacom many years ago because Cell C is failing their customers. My father recently passed away. My mom's cell phone contract was in his name. My mom has been trying to put her phone on her name because Cell C have stopped her service. No one can contact her because her phone has no service. She has emailed all the required documents THREE times, spoken to many people at Cell C and yet still they keep asking her to email the same documents over and over again. Clearly Cell C does not care for their customers and have shown no compassion for my mom who has just lost her husband. I am disgusted Cell C. My mom has shown all evidence that my father has passed! What else is she supposed to do ???