Vodacom warehouse messed up my delivery address

I did an upgrade with vodacom last week. I then only received my tracking number today after calling them.. I then checked the status of my order only to find out that the address provided to ram was wrong. The same thing happened last year December n January whereby I never received my parcel. When u call their call center or contact their Twitter account u don't get a resolution. Apparently some person must call me again to confirm my address after two days. Wat type of nonsense is that? I mean they have my address on their system and dey get it wrong all the time. Their warehouse always mess up my address n the call center cannot resolve the problem . U ask to speak to their senior person no one is available. I am really disgusted by their service.. I mean this is the third time my address is messed up from their warehouse side.. What should I do if dey work with *********** people???