3 weeks and still no resolution to new cell phone activation

We upgraded our two phones online with trade-ins. Phones arrived and couldn't be activated properly because both phones were issued to the same phone number. I was advised to visit the store to return both phones and reorder. The store advised me that because one of the phones was never activated and in a pending activation status, it would not be returnable until activation was complete. After a week and a half, several calls and two trips to the store, a call to tier 2/3 to get this resolved, they got both phones working.

A week later I reviewed my bill and only had trade-in credit for one phone. I found out that to get both phones working they simply edited the sim number to the old phone we were supposed to be trading in and used the sim number from the new phone that needed to be activated/returned. The store escalated the issue to tier 3 and I was told the phone would be activated in an hour or so, then updated they needed another hour. I drove back to work while waiting for an update and returned to the store two hours later. I was advised the issue couldn't be corrected and it would be the next day before activation was complete.

The next day, the store advised me the activation process could take up to four days. That would mean four days without mobile service. Unacceptable. My wife and I use our phones for work so we were forced to add two new lines of service and buy temporary phones. I found out today that the temporary phones are only returnable for 14 days, which will be 10 days from now. At this point I don't have much faith in Xfinity's ability to resolve this issue, it's been 3 weeks. You can never reach the same person on the phone or at the store and I've explained the complicated nature of this issue more times than I can count.

To top it all off, we were instructed to send in the trade-in phone that was valid and Xfinity has the wrong IMEI of the trade-in tied to the wrong phone. So they'll be receiving the wrong trade-in device. I really don't understand how our account became so messed up in the first place and why it's so difficult to resolve.

And DO NOT fall for the free iPad gimmick the chat reps try to sell you, it's not free. 

Some people have questioned why go through all this? Just cancel and switch carriers. Well, until the account is resolved apparently we can't port our numbers to another carrier. So here we are, stuck without any glimpse of a solution 3 weeks after receiving replacement phones.