Customer Loyalty Plan

We have had beyond our fair share of many difficulties with TMobile since Day 1. Let's see where do I even begin to start...1st the plan was never correct since Day 1, then the Bonus of 1K Visa for porting was never applied and now months later when applied, I was denied due to them saying I had a past due balance. The issue here is bill has never been correct so I have always been carrying a past due every month. On top of that never received any credits I was promised many times and I'm paying like over $400 for 5 lines that I have to keep setting up payment arrangements and never getting caught up. Speaking of which have a payment due today, just paid an arrangement 2 weels ago. It's like a hamster in a wheel just spinning. Then finally I have a device that hasn't worked since I traded in..My Apple phone doesn't receive calls, receive texts, camera don't always work. The response every time is "must be Apple" then sends me to them, who did their troubleshooting and says their is nothing wrong with software etc..then says its Tmobiles network and I bounced back and forth with no resolution....Apple offers a warranty replacement with a copay...are you serious? TMobile wont replace. Here 6 months later and still have a broken device, by the way paying faithfully on service that I feel is anything but stellar. Talked to supervisors nothing has changed. This is why we want to leave!