You may not have received your full winnings as it may be subject to a withdrawal fee or wagering requirement. Any winnings under £10 will have a £3 withdrawal fee. If you have any winnings from a no deposit bonus, then you can only withdraw a maximum of £50 for UK players and €50/$50 or other currency equivalent if you are a non-UK Player. To find out more about our payment withdrawals, we recommend checking out our Terms and Conditions.
Of course, this can vary customer to customer, so it may be best to contact out customer support team.