Amaryllis update

A couple of months of growing and absolutely no flower. I phoned up M&S today and they suggested bringing it into my local store to see whether they can suggest anything/give me a replacement. My sister sent me a photo of hers which flowered a couple of weeks ago and looked amazing. I presume it's to do with forcing the bulb to grow (I've had issues with M&S plants before), which is why it's always better to buy from a garden centre!