No after sales service

What an utterly disappointment the experience at Vodacom Greenstone was, the after sales service received was atrocious. I handed in my iPhone 6s in for display repairs on the 27 April 2016, I was told that they are offline and that they will book my phone in as soon as they are online. The person helping me at the time said I can call on Friday for a job number, being the patient and understanding person I am I decided to only call for the job number on Tuesday after the long weekend. What a shock when I called, no phone was booked for repairs.... they said they will book it immediately, this only happened late afternoon. So being patient and understanding I let it go. Friday the 7th of May I receive a sms telling me that my phone is in transit and that it can be collected soon. Sa****ay the 8th I went to Vodacom Greenstone to find out if my phone is there, no phone received yet but I was given the electronic receipt with the job number and info on what the phone was booked for only to see that my phone was booked in with external damage... ***!!! So the consultant said its just a mistake, he said my phone will be there bu Wednesday, Wednesday came and gone and no call from them. So today the 13th of May I called the store to find out if my phone is there, eventually it was so being a working individual myself I asked till what time are they open... I was given the reply to never ask that question on a Friday ever again. WOW some customer service, cant complain about it! BECAUSE THERE ISN'T ANY!!!!! So off I went to collect my phone, upon receiving it I checked to see if the purple and yellow mark was repaired (Only shows in a black background when the display is on and not when it is locked), **********ly disappointed to find that the display is still EXACTLY the same. I was then told to take the phone to Vodaworld myself as they will only send the phone back again unpaired. Now I am not at all understanding anymore and no patience is left, I could not believe my ears what I was hearing. Why did the technician or someone not call me and tell me they are failing to find the fault and if I could explain where and how it happens exactly. I am out of patience. Kindly replace my iPhone with the exact same model and storage if it cannot be repaired or if you are too lazy to tend to a customer repair complaint. Should this not happen within 5 working days you can expect to hear from my lawyer and you may cancel the contract. Disgusted with Vodacoms service after being convinced to move over from MTN.