ABSOLUTELY SHOCKING. *****ing money from a pensioner!!!

There is negative rating I would like to give them - but this wasn't an option.

My dad 75 years old has had a Cell C account for over 20 years. He has never missed a months billing. He tried to cancel his account 2 years ago but this never happened and has paid every since. His account it coming up for renewal as of today and at the end of July they double debited (R1300) an amount triple his normal subscription of R215 per month. He is on government pension of R1800 per month therefore due to Cell C he has R300 for his chronic medication and food for the month!!!. I have called Cell C, emailed and posted on Facebook and it is 3 weeks later and we still await the reversal. They have confirmed it is their issue but we are yet to see the refund back into his account. I am appalled by the service and complete disregard of a human life and well being! If it wasn't for his support he would of starved or died of his chronic illness due to non medication. I have posted on social media and now posting here, as desperation to get this solved. Any other suggestions are welcome as I am happy to take this to any powers that be to get this sorted.