You are free to call them. Sometimes, it takes around 90 or longer to answer. Why you think he did not get your documents? Do you have proof, you sent it? Always keep a copy and send stuff by registered mail. If the case takes longer, you might want to have an immigration attorney to help.
Founder and Managing Attorney of Shah Peerally Law Group PC
Law Firm Deals in Immigration law & Debt Relief
Note: The above answer is provided for informational use only. One should not act or refrain to act solely based on the information provided. No attorney client relationship is created unless a retainer is signed by the attorney and the client.