Continued bad service from Vodacom with no effort to quickly resolve

Very bad experience with Vodacom when trying to upgrade my cellphone contract - again!!! I haven't upgraded for years due to very bad experience with Vodacom the previous time I tried to upgrade (experience was so bad that I ended up cancelling the upgrade). I thought I would give them another chance, but once again issues. Wrong phone was delivered last week and contract also wrong (not sure where things went wrong - can be either side, so don't blame them for that). However, logged call last week Wednesday to return phone and amend contract to the correct one. Five days later and I did not even get the confirmation that phoned will be picked up!! I had to phone after the sales service again with no excuse on Vodacom's side. Now I have to still wait for the phone to be picked up and then apparently have to wait about 14 days before contract can be amended and I can get correct phone - really don't understand why - can't be that difficult to deliver better and faster service!!! Really don't know what more to do and how anyone can think that it is acceptable service. I am strongly considering moving to another service provider - Always some issue with Vodacom. I understand things can go wrong, but there is absolutely no attempt from Vodacom to quickly resolve issues when it do occur or to go the extra mile to resolve - just citing firm procedure and protocol as excuse for bad service, i.e. when I asked representative how this level of service is acceptable and why phone has not yet been collected five days later after call was logged, his only response was that he did not log the call last week!!!!