As Terri says, your agent is the go to person for this issue. If you have no agent, you should be talking to the listing agent directly. Or now is the time to hire an agent, but since the offer is already in, you'll have to pay the agent yourself.
Your agent is your best resource as he/she is connected to the listing agent (unless the agent is a dual agent) and then the listing agent is connected to the negotiator.
The listing agent usually gives regular updates, such as a negotiation has been assigned, or if they needed to request the file to be escalated.
All the best to you. Short sales are anything but short. There are various factors which can affect the result, how many loans, who the loans are, the balance and type of loan, the hardship of the seller, is the seller in the process of filing bankruptcy, and so much more. Us agents here do not have access to the details of your file and therefore your agent is the best resource.
Its not atypical to get no response from Wells.
They are a thorough and solid lender.
They are likely checking if you are a Straw Buyer, status of the seller,
are the facts claimed by seller True etc.
Top 2 agent nationwide at Keller Williams Realty
Over 30 years experience
Over 1,000 homes sold in Santa Clara and San Mateo Counties