NO HELP FOR ELDERLY CUSTOMERS

My Dad took his phone to Sheryl for her to check why it did not receive sms's. She claims she only changed the settings, and had to switch the phone off and on again - the phone didn't turn on again. She sent him away with a phone that is now not working as opposed to when he brought it in, the phone worked perfectly. Both Sheryl and Beverly (obviously colleagues who side with each other) refuse to take any responsibility for their actions and are extremely rude over the phone. Whatever happened to keeping your customers happy - since when do you try to help, but instead cause a hindrance then send your customer away unhappy and more distressed than wen they got to you. My Dad is elderly, I am in Pretoria and therefore assumed that taking his phone to MTN would be the best and this is the result we got. He now sits with a phone that doesn't turn on (although it was fully charged and functional when he took it in) , and the ladies at MTN Bluff take no responsibility and do not propose any way forward. How utterly pathetic to think we send our parents to get help from professional people at a reputable outlet and this is the outcome.