MTN HQ no concern for clients

I have had a contract with Mtn for over 10 years and deal mainly with the Mtn store in Grahamstown. I am not complaining about the service received from the consultants and franchise holder of the Grahamstown store - my complaint is for Mtn head office. Over a period of more than 6 weeks, I have experienced continued bad service from the Mtn repair centre - I sent a Sony Experia handset in for a minor repair 6 weeks ago (dropped phone and battery came loose, being a sealed unit, it had to go in for repairs), I still do not have the handset back, despite numerous efforts by the Grahamstown store to get honest update information. I am also experiencing a problem after returning a CAT handset with a factory fault, this matter was also reported more than 6 weeks ago. Mtn appears to have become totally disconnected to it clients and very apathetic about customer service!! Mtn, you need to buck up your service and support your franchisees, I know that I am not the only one who is fed up with your bad attitude!