Bad service

I app**** for a new contract that was approved and i needed to let them know which phone i wanted. I did that on wednesday 2weeks ago and they told me it wil be here on friday. Friday came but no phone. Monday sir. Monday came and no phone. Wednesday sir. Wednesday came but no phone. Friday sir. Friday came. Phone arrived...but it was the wrong one. Then the person told me that she didnt know that there is 2 different phones. (PHONE I WANTED IS P8) P8 lite arrived on the friday. She then said that she will have to return it. Phoned back and said her manager said she must order phone and it will be here on wednesday. Well its wednesday today and no phone. All she said was phone is not here. Thats it. We had to phone them back to find out whats going on. Now they say it will be here on friday. It has been 2 weeks now this back and forth. I have been with MTN before now and want to move over to vodacom but i just cannot understand how the best network in SA deliver such bad service. All i want is my phone which i have been approved for and will be paying for.