Unable to assist the elderly

My gran is 86 years old, she's been trying to cancel her contract and data subscription. We have been directed that this can only be done via the call center. The call center is not willing to help, I have said to them that my gran is 86 years old, and barely able to hear. Yet they are unable to assist an elderly pensioner. What is this??? Cell C needs to provide an answer for this as this is unacceptable and pathetic. I want this resolved immediately. I am,writing this on behalf of my granny. You have caused my gran many tears Cell C