Requested a settlement letter 3 weeks ago and made calls on a daily basis with no luck to get help?

WHAT DOES ONE HAVE TO DO TO GET SOME GOOD SERVICE FROM YOU GUYS??? Worst service i ever got from a network provider ?? From when I had to put a claim for my lost cellphone and you guys gave me a run around until you decline my claim, now i wanna settle the so called contract and its been 3weeks now requesting a simple settlement letter and no one seems to make it happen from your side. I don't want anything to do with you guys, stop acting like an annoying ex partner that doesn't want to let go. Give me the quote so that i get off y'alls back, and i sure won't recommend you guys to my friends and family. Customers worst nightmare ??????