Apple Watch 2 rapidly zooming in and out glitch

As of today, my Apple Watch has started zooming in and out rapidly, as if the the crown is being twisted very fast from side to side. Notification centre just bounces the notifications up and down with difficulty in dismissing them, battery is also rapidly going down throughout the day. Any ideas of a fix would be greatly received. Would rather not have to be shell out an exorbitant fee of over £200 for it to be serviced, disgraceful fee, more than half the price of the watch 2 years ago 😡