call my cell phone all hours of the day and night  never leaves a message.  If it's a wrong number, then at least have the courtesy to say SORRY.

Repeated daily calls sometimes every fifteen minutes. Never leaves a message.

This is MRS Services. We called them back. They are a financial services company of some sort. They were very friendly and apologized for calling our number, as it "must have been a wrong number". We were getting frequent calls. FYI: Just call them back and ask them to remove your number or even better if you answer these sales calls when they call instead of avoiding them, you can deal with the issue right then and there and have your name and number removed.