XFINITY HAS MESSED MY ACCOUNT ALL UP

I am exhausted at customer service calls to fix a simple issue. I got an iphone and decided i didnt like it and wanted to return it, mind you I was within the 14 days window or whatever to return a new device, I contacted xfinity and kept getting the run around like trying to make me wait past 14 days to get stuck with the phone, finally on day 14 a rep got it sorted out and sent me a return label, rep was also sending me a new PSIM for a moto on the account that i used previously to iphone purchase, the PSIM was never sent!!! got in touch again and finally got a sim shipped, i get the psim and when i activated it it linked to my a different number on my account rather than my line. been on the phone all day today with xfinity and my account it now more messed up then ever. phones on wrong lines and i use my line for work and now without my number due to pending order that isnt even correct and no way to fix it to make it clear faster. I use this to log into my system for work and have no number now!!!