Negligence from Vodacom

I have never received such bad customer service from Vodacom. I took in my phone for it to get repaired 6 weeks to date, I received a call that my phone can’t be fixed and was given the choice between a refurbished phone or a new phone , I choose the option of receiving a new phone, my claim was submitted and was approved , but before I receive a new device I have to wait for the old salvage unit to return from the repair centre so I can receive the new device, then all of a sudden I was told that the salvage unit was lost. Now I am having troubles receiving a new phone due to the reasons above and I don’t understand how Vodacom is making me wait so long for a fault that was done by them, may this case be resolved ASAP as I use the device for school and it’s the only device I have, now thanks to Vodacom I am missing vital emails and online classes.