Blocked account

So my account is blocked by ***** department. I call them after visiting branch twice and they advise to write affidavit and submit it. No one calls me. After calling and calling a guy called Allen calls me and says i must pay back the money that was deposited and withdrawn in my account. Though I do not know anything about that money I have resolved to opening a case against this department but to my disappointment they can not give me the Ref number of the apparent investigation. I got my salary on the 23rd. I dont have access to my hard earned money. I haven't paid school fees for my children. No one has touched my salary but standard bank debited their monthly fees. This department is so ***********. I spoke to 3 different analyst who don't seem to be able to help let alone call back. Im frustrated at this point and I don't have anywhere to go.