Is it reliable for Caida to apply for a refund?
Not reliable. According to official website of Caida Securities, it can be known that Caida refund is a kind of online fraud. It uses the refund problem of education and training institutions to induce consumers to join QQ group, and then defrauds money for various reasons. Caida Securities is a regular securities company and has nothing to do with refund, so it is not reliable.