The Worst CUSTOMER SERVICE EVER!

Ireceived a Faulty Sony experia Z5 from vodacom that was over heating.I called Vodacom online and complained about the phone and they suggested that it be returned as i was still with in the 7 day warranty period.i did that on the 12/11/2015 and nothing happened.Monday the 16/11/2015.I called in to ask when my phone would be collected as nobody called me from vodacom to confirm the pick up from the courier company.I was transferred from one department to the next. I then got to speak to Charleen and she promised that i would get a new phone by the 23/11/2015 and that i would be reimbursed for the Screen gaurd that i bought with WITH MY OWN CASH.She said that i should just make note of it when the courier company collects my Phone. and so we did.i was then told that the phone would be collected on17/11/2015 but then again vodacom did not live up to the promises that it made me. they only collected the phone on the wednesday 18/11/2015. and a note was made regarding the Screen gaurd that was sent with the phone. On friday the 20/11/2015 i spoke to Tania and she promised that i will get all that was promised. Now vodacom does not want to reimburse me for my own cash that was spent.