Bad customer service

My father purchased a nokia cellphone cash at the store in mid july this year,he then encountered a problem with the battery of the phone ,he then took it to the store in july to report it .complaint was logged and was told he will get it after 2 weeks . He gave my number so that they could contact him in case the phone was repaired and he had to fetch it ... no 1 is bothering to follow up with us and update us with the phone , we constantly have to call Tumi the consultant to follow up ,it's been 3 months now and they keep telling us that the supplier does not have the parts to repair the phone till now... My dad is unemployed and has to literally catch a taxi from soweto to East rand mall to follow up about the phone which he does not get any assistance.. a call was made again today this morning and spoke to the manager , she said she is aware of the matter but she still needs to confirm with tumi the consultant then she will call me back ...I'm still waiting even now