Sometimes it's normal for people to not get credited for certain offers, it happens to all of us once in a while. What kind of offers have you done exactly, and how long have you waited for? There are tips to make them credit easier such as clearing your cookies, using alternate email addresses, and doing them in different web browsers.
As for the surveys, if you complete it and make it all the way to the end then you should be getting credited for it. Wait at least a full day and if still no credit send in a support ticket to Fusion Cash and they should take care of it.