To raise your credit limit and available credit to spend you'll need to call your credit card company to get them to consider raising the credit limit.
If you've had your credit card with Wells Fargo or any other credit card company for at least 1 year and you haven't missed any payments on the credit card balance then you should have no problem getting a raise on your credit card spending limit.
If you've missed even the minimum payment even once you will have a harder time getting the credit card spending limit raised.
I would only request a raise in the credit card spending limit if you know you can actually pay it back.