Change of Delivery Address

I ordered a phone through Vodacom two weeks ago but they didn’t have stock. I asked that once stock was received if I could be called to possibly update my delivery address as I was going on leave, this was not done. On Monday morning I received an SMS from Ram to Ram Couriers stating it would be delivered on Monday. I then phoned them and they said I have to get Vodacom to notify them of a change of address as they are not allowed to do that. I then phoned Vodacom and waited almost an hour to speak to a consultant who was not interested at all in my problem and dropped the call on me. Another hour later waiting, another consultant said they would notify the couriers about the change of address. Tuesday morning I received another sms of delivery of the phone which was still the first address and it had not been updated. I then called the couriers and they had not received the notification of change of address still. I then called Vodacom again and was told by another consultant they would notify the couriers about the change of address. Today I had the same issue and Vodacom are still yet to send the email of change of address. I am going overseas on honeymoon on Monday and I don’t know what will happen with regards to the delivery. Could someone kindly please assist me in this matter.