No network for 8 days

I suddenly received a "no network" error. I have been on calls, chats, to the store, and to an authorized repair facility for 8 days. I was told I would need to purchase a new phone. I knew that I didn't need a new phone but I was told this was the ONLY resolution. After purchasing a new phone I still get " NO NETWORK"! I spent 3 hours last night between chat and calls to be told a request ticket was placed that would take 3 DAYS TO RECEIVE A RESPONSE! I am frustrated and overwhelmed! I have asked for a supervisor every day for 8 days and have yet to speak with one. I went to an authorized repair facility to be told it was not a phone issue but a network issue. He placed a razor inside of my case. It fixed the network issue for a few minutes but then back to NO NETWORK! I have spent money that I didn't have and time that I can't get back only to be told that it will take 3 MORE DAYS JUST TO GET A RESPONSE.. NOT A RESOLVE! HELP PLEASE!