Faulty service delivery on several levels

I app**** for a new contract - iPhone 6S 64GB. Application was approved and waiting period started. When notified of the successful application after almost a week, and 2x after when following up on the long wait I confirmed all the details of handset repeatedly - was correctly captured. Wanted to port an existing number. Checked details also to be correct. When receiving the phone - wrong handset, and wrong number to be ported. Same day, only 30 minutes after receipt courier collected handset to return it. Contacted them after 3 days. Told me I had to wait at least 10 days. Phoned after 17 days. Told me my phone was successfully delivered to me (no return on system). After holding on forever, they located returned package... BUT... I was told that I needed to re-apply and go through the whole painful process again! It is ridiculous to apply for a contract twice (my application for the handset of choice was successful, my details stayed the same and are already on the system). An employee did not do their job, they pull up their shoulders, and I need to go through all of this again! I'm probably going to have to deal with the same idiotic employee again in the chain of command...