Terrible Service with no compassion for Seniors

Hi There, My Mum purchased a cellphone from Jet in Chatsworth Centre and has been having numerous problems, she is an elderly woman(69 Years old) and they keep making her run back and forth on numerous occasions as this is a recurring problem and she uses public transport, the staff that works in the cellular department is rude as I had a problem when i visited the store this past weekend, they asked my mum to return in a weeks time to check for the phone but when we get there they tell us it takes 3 to 4 weeks when she was initially informed to return in a weeks time, I had a chat with the manager about the rude staff member, she then explained the process and apologized for the rude staff member, we then left, My Mum was contacted Yesterday(6 June 2018) to collect the phone, she goes to jet with public transport, then the same staff member hands her the phone , she requested for him to assist her in inserting the sim card and activating the phone to see if everything works accordingly before she left, he refused and told her that she must go do it at home, Now this is where the problem lies as i` have tried activating it and the phone still has the same problem.