not all fusable batts are created equal- like with most things- unfortunately for your first time you got one of the (not so great) ones.
you can lightly spritz it with water- smooth it between your layers of fabric & press it from the center out- carefully flattening the wrinkles as you go. it is possible to use it & get the wrinkles pressed out as you go- press one side, then flip your fabric sandwich over- spritz *lightly* and press the other side from the center out again.