Verizon Wireless keeps harassing me?

With each collection company, (has been at least 6) I send them an explanation of their "so called debt"(explanation below). They drop it, then Verizon hires another. What can I do?

I was with Verizon for many years. Had Unlimited everything(granddaddy plan). The wouldn't upgrade me unless I changed my plan. I had an iPhone 4S that was having issues, she had me check the unit for water damage. I told her I had the Insurance and would pay the $50 deductible. She said it was covered under warranty because it was less than a year old and they sent me out a warranty phone. I sent the old one back immediately. About 3 weeks later I switched to Sprint, the had the upgraded phone I wanted and unlimited plan. About a month went by and Verizon contacted me about the "warrantied phone" claiming it had water damage. Now I no longer had the insurance and was no longer with them. I told the I won't pay and I NEVER WILL!

You're going to have to pay them or they won't stop calling. You'll probably get sued at some point if you don't pay too.

No! Or else the last 5 collections companies would have filed on me. They know they have NO CASE!