Blocked customer

So as per discussion previously to vodacom, I have been blocked and can not get help on their customer service call centre. So now as the consumer of the vodacom service, I'm really disgusted and shocked at how they VODACOM treat me. On the upgrade that was done the wrong device was sent to me. I was well in my 14 days T&C of what vodacom requested when you receive the wrong device or that you as the consumer not happy with the package. So I did what was required of me to inform VODACOM of this, I was told to send an email with the pick up adress as I got an SMS that says my quiry is being looked into and not even 3 hours later another sms stating my quiry has been closed. VODACOM make promises that they cant keep to get back to their customers. I was promised heaven and earth with a call back and nothing has happened. 3 weeks later (mind that I'm out of my 14 days T&C ) the device was collected. 21 days later.....how is that right. I kept on following up with VODACOM what led me to be blocked. As from the 29th of November 2019 this has been going on. Today would make it the 21st of December 2019 which is almost a month later and still nothing has been done with this upgrade. I was informed that the person who picks up the devices were on leave ... so now my question is ... how is that my problem? So VODACOM only have 1 person who picks up devices??? And for the record how is this the consumers problem if sending emails with the pick up adress as the pick up adress is the same as the delivery adress.... so what has changed??? I am very disgusted in the manner I have been treated and will for sure not recomend vodacom to anyone.