We'd be happy to help with any order enquiries or questions you might have about Number Stacks. We've answered some of our frequently asked questions in the following document which might be worth checking first to see if it can help.
Number Stacks FAQs
If you still can't find the answer to your question, you can email us at support@numberstacks.co.uk or message us via Facebook, Twitter or Instagram (@NumberStacks) and we'll get back to you as soon as we can.