Disgusting customer service

I wish to make a complaint regarding the worst service encountered from the Mtn staff at the repair centre and at the shop in Nortgate Mall. On the 04/04/2015 I took my iPhone 5s for repairs and I was told that it would take 2 weeks to repair, this morning after a month of no feedback and after I had visited the store and tried calling the repair centre on numerous times without my call being answered, I was told that the phone has not been fixed due to the find my iPhone app being active, I told the consultant that I had left 2 contact details on the forms when I handed over my phone for repairs to be contacted on and common courtesy and good customer service would have warranted a call to alert me of the so called find my phone app being active. what is ridiculous about this is that when I handed my phone in for repairs I asked what the requirements were before handing it in and not once was it mentioned to me which app had to be deleted or deactivated, I can't believe that Mtn can employ such *********** and reckless individuals as the face of their brand, I am deeply upset by this and your *********** staff has put me off your brand after years as a loyal customer.