We offer free shipping as a benefit to our customers for orders meeting a minimum and maximum order value - these values are dependent on the location you are ordering from.
If your order does not qualify for free shipping then you will not see this relevant option in the checkout.
We may, at our discretion, choose to refund any orders where we consider there to be consistent abuse of the free shipping option e.g. customers making repeated low value orders whilst selecting the free shipping option.
We also reserve the right to combine two or more low value orders received within a relatively short time of each other.