Liberty not responding to queries

Approximately in November last year I started receiving messages from a company called ICTS, who trace people on behalf of Liberty, requesting that I fill in certain forms and submit them to claim money. Initially I thought it was a **** but it turned out to be real. I was concerned however because I had been informed that if I claim any funds my disability benefits would be cancelled. I therefore contacted person after person at Liberty to find out whether my current benefits would be affected. Eventually Mr Earl Clarke said he would clarify the matter for me. Still it has been months, and simply no definitive answer from them! I just don't know what else to do!