5 year price lock

So when I initially signed on to Xfinity the five year price lock wasn't an option and I didn't know if I was going to be living in my apartment for another year while I am and I noticed that Xfinity has this new thing where people get to lock their price for 5 years I would like that option too but I don't see it available for existing customers my current deal with Xfinity expires next month however I would like to lock my price in I need a customer service rep to directly message me