Hi Trouble.Before you try this fix,UNPLUG the machine from the mains plug socket, & if there are water isolation taps, turn them off! If you can, pull the machine out so the back plate/cover is accessable. You should then be able to to remove the back plate.(useually about 6 or more small crosshead screws). You might find a large thin belt which has come loose or snapped, from a small & a large pulley "type" wheel.
If this is the case, first check both belt wheels for breaks. Then check the belt for splits or cracks. These belts are cheap & readily available for most machines. Some times a belt will just need to be re-fitted on to the pulley wheels, as it has come loose due to a unballanced load in the drum which makes the machine want to "Tango Dance" across the kitchen floor! If you do not feel confident, leave well alone, but be prepared to pay call out & charges, which can add up.