Call of duty: black ops 15th prestige lobby

hello all, i am looking for a Call of duty: black ops (xbox360) challenge lobby, etc.
any kind of lobby that is guaranteed to get me to 15th prestige fairly quickly. i do not care what level i am in 15th prestige, i would just like to be 15th for when im playing with my friends because most of them are 15th.

if you have a jtag and can host a lobby for me send me a message saying so on Xbox live. my gamertag is: REDLIFESAVER69

p.s. i would like it if you could show me proof of it working beforehand that way i know it wont derank me. i also need this to be free as i have no money/microsoft points.

thank you to anyone who can help.